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Humberto Delgado Airport to Dulles International Airport flight

Explore the cheapest one-way and round-trip flights from Humberto Delgado Airport to Dulles International Airport over the next 90 days, with one-way fares from RUB 29,964 and round-trip from RUB 42,504. Based on Trip.com's latest 7-day flight data.

    • Cheapest nonstop
      LIS 10:55
      8h 50m
      Direct
      IAD 14:45
      Lisbon - Washington D.C. | Tue, Nov 10 | TAP Air Portugal
      IAD 22:30
      7h 10m
      Direct
      LIS 10:40
      Washington D.C. - Lisbon | Sun, Nov 15 | TAP Air Portugal
      RUB 49,227 RUB 71,275
      31% off
      31% off
      RUB 71,275 RUB 49,227
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Thu, Nov 12 | TAP Air Portugal
      IAD 17:25
      7h 10m
      Direct
      LIS 05:35
      Washington D.C. - Lisbon | Tue, Nov 17 | TAP Air Portugal
      RUB 49,892 RUB 71,275
      30% off
      30% off
      RUB 71,275 RUB 49,892
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Sat, Nov 21 | Finnair
      IAD 17:50
      24h 35m
      1 stop
      LIS 23:25
      Washington D.C. - Lisbon | Mon, Nov 23 | Finnair
      RUB 42,504 RUB 71,275
      40% off
      40% off
      RUB 71,275 RUB 42,504
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Sat, Nov 21 | Iberia
      IAD 17:50
      24h 35m
      1 stop
      LIS 23:25
      Washington D.C. - Lisbon | Mon, Nov 23 | Finnair
      RUB 42,540
      40% off
      RUB 71,275 RUB 42,540
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Thu, Dec 10 | American Airlines
      IAD 18:05
      13h
      1 stop
      LIS 12:05
      Washington D.C. - Lisbon | Sun, Dec 13 | American Airlines
      RUB 45,333
      36% off
      RUB 71,275 RUB 45,333
    • LIS 16:55
      29h 20m
      1 stop
      IAD 17:15
      Lisbon - Washington D.C. | Tue, Nov 10 | Scandinavian Airlines
      IAD 20:30
      14h 35m
      1 stop
      LIS 16:05
      Washington D.C. - Lisbon | Mon, Nov 16 | Scandinavian Airlines
      RUB 45,478
      36% off
      RUB 71,275 RUB 45,478
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Mon, Nov 30 | American Airlines
      IAD 21:45
      12h 10m
      1 stop
      LIS 14:55
      Washington D.C. - Lisbon | Mon, Dec 7 | American Airlines
      RUB 45,696
      36% off
      RUB 71,275 RUB 45,696
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Fri, Nov 20 | American Airlines
      DCA 17:10
      10h 55m
      1 stop
      LIS 09:05
      Washington D.C. - Lisbon | Sun, Nov 22 | American Airlines
      RUB 46,059
      35% off
      RUB 71,275 RUB 46,059
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Tue, Dec 15 | American Airlines
      IAD 18:05
      13h
      1 stop
      LIS 12:05
      Washington D.C. - Lisbon | Tue, Dec 22 | American Airlines
      RUB 46,131
      35% off
      RUB 71,275 RUB 46,131
    • LIS 13:00
      17h 25m
      1 stop
      WAS 14:00
      Lisbon - Washington D.C. | Sun, Oct 25 | Normal Airline
      WAS 15:00
      6h
      Direct
      LIS 16:00
      Washington D.C. - Lisbon | Tue, Oct 27 | Normal Airline
      Find more flights
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    • Cheapest
      LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Fri, Nov 27 | Iberia
      RUB 29,964 RUB 55,192
      46% off
      46% off
      RUB 55,192 RUB 29,964
    • LIS 06:35
      17h 15m
      1 stop
      IAD 18:50
      Lisbon - Washington D.C. | Tue, Oct 27 | Iberia
      RUB 30,919 RUB 55,192
      44% off
      44% off
      RUB 55,192 RUB 30,919
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Mon, Nov 23 | Iberia
      RUB 34,632 RUB 55,192
      37% off
      37% off
      RUB 55,192 RUB 34,632
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Fri, Nov 27 | American Airlines
      RUB 34,994
      37% off
      RUB 55,192 RUB 34,994
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Mon, Nov 30 | American Airlines
      RUB 35,575
      36% off
      RUB 55,192 RUB 35,575
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Wed, Nov 25 | American Airlines
      RUB 35,587
      36% off
      RUB 55,192 RUB 35,587
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Sat, Nov 28 | American Airlines
      RUB 35,660
      35% off
      RUB 55,192 RUB 35,660
    • LIS 06:30
      14h 50m
      1 stop
      IAD 16:20
      Lisbon - Washington D.C. | Tue, Dec 8 | American Airlines
      RUB 35,660
      35% off
      RUB 55,192 RUB 35,660
    • LIS 08:25
      12h 5m
      1 stop
      IAD 15:30
      Lisbon - Washington D.C. | Thu, Oct 29 | American Airlines
      RUB 35,696
      35% off
      RUB 55,192 RUB 35,696
    • LIS 13:00
      17h 25m
      1 stop
      WAS 14:00
      Lisbon - Washington D.C. | Sun, Oct 25 | Normal Airline
      Find more flights
      Find more flights
    • Cheapest nonstop
      LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Fri, Dec 11 | TAP Air Portugal
      RUB 37,171 RUB 59,769
      38% off
      38% off
      RUB 59,769 RUB 37,171
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Thu, Nov 19 | TAP Air Portugal
      RUB 37,884 RUB 59,769
      37% off
      37% off
      RUB 59,769 RUB 37,884
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Thu, Nov 26 | TAP Air Portugal
      RUB 38,380 RUB 59,769
      36% off
      36% off
      RUB 59,769 RUB 38,380
    • LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Wed, Dec 16 | TAP Air Portugal
      RUB 38,513
      30% off
      RUB 55,192 RUB 38,513
    • LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Wed, Dec 9 | TAP Air Portugal
      RUB 38,513
      36% off
      RUB 59,769 RUB 38,513
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Thu, Nov 26 | TAP Air Portugal
      RUB 38,634
      30% off
      RUB 55,192 RUB 38,634
    • LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Wed, Dec 2 | TAP Air Portugal
      RUB 38,670
      35% off
      RUB 59,769 RUB 38,670
    • LIS 16:45
      8h 50m
      Direct
      IAD 20:35
      Lisbon - Washington D.C. | Sun, Dec 13 | TAP Air Portugal
      RUB 38,707
      35% off
      RUB 59,769 RUB 38,707
    • LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Wed, Nov 25 | TAP Air Portugal
      RUB 39,045
      35% off
      RUB 59,769 RUB 39,045
    • LIS 13:00
      17h 25m
      1 stop
      WAS 14:00
      Lisbon - Washington D.C. | Sun, Oct 25 | Normal Airline
      Find more flights
      Find more flights
    • Cheapest nonstop
      LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Fri, Dec 11 | TAP Air Portugal
      RUB 37,171 RUB 71,275
      48% off
      48% off
      RUB 71,275 RUB 37,171
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Thu, Nov 19 | TAP Air Portugal
      RUB 37,884 RUB 71,275
      47% off
      47% off
      RUB 71,275 RUB 37,884
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Thu, Nov 26 | TAP Air Portugal
      RUB 38,380 RUB 71,275
      46% off
      46% off
      RUB 71,275 RUB 38,380
    • LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Wed, Dec 9 | TAP Air Portugal
      RUB 38,513
      46% off
      RUB 71,275 RUB 38,513
    • LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Wed, Dec 2 | TAP Air Portugal
      RUB 38,670
      46% off
      RUB 71,275 RUB 38,670
    • LIS 16:45
      8h 50m
      Direct
      IAD 20:35
      Lisbon - Washington D.C. | Sun, Dec 13 | TAP Air Portugal
      RUB 38,707
      46% off
      RUB 71,275 RUB 38,707
    • LIS 16:40
      8h 50m
      Direct
      IAD 20:30
      Lisbon - Washington D.C. | Wed, Nov 25 | TAP Air Portugal
      RUB 39,045
      45% off
      RUB 71,275 RUB 39,045
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Thu, Dec 3 | TAP Air Portugal
      RUB 39,069
      45% off
      RUB 71,275 RUB 39,069
    • LIS 11:25
      8h 50m
      Direct
      IAD 15:15
      Lisbon - Washington D.C. | Sat, Dec 12 | TAP Air Portugal
      RUB 39,589
      44% off
      RUB 71,275 RUB 39,589
    • LIS 13:00
      17h 25m
      1 stop
      WAS 14:00
      Lisbon - Washington D.C. | Sun, Oct 25 | Normal Airline
      Find more flights
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    • LIS 12:20
      8h
      Direct
      IAD 15:20
      Lisbon - Washington D.C. | Sat, Oct 24 | United Airlines
      RUB 87,945 RUB 146,399
      40% off
      40% off
      RUB 146,399 RUB 87,945
    • LIS 12:20
      8h
      Direct
      IAD 15:20
      Lisbon - Washington D.C. | Sat, Oct 24 | Lufthansa
      RUB 88,042 RUB 146,399
      40% off
      40% off
      RUB 146,399 RUB 88,042
    • LIS 12:20
      8h 20m
      Direct
      IAD 15:40
      Lisbon - Washington D.C. | Thu, Nov 26 | United Airlines
      RUB 73,676 RUB 146,399
      50% off
      50% off
      RUB 146,399 RUB 73,676
    • LIS 12:20
      8h 20m
      Direct
      IAD 15:40
      Lisbon - Washington D.C. | Tue, Dec 29 | United Airlines
      RUB 74,922
      49% off
      RUB 146,399 RUB 74,922
    • LIS 12:20
      8h 20m
      Direct
      IAD 15:40
      Lisbon - Washington D.C. | Thu, Dec 17 | United Airlines
      RUB 75,393
      49% off
      RUB 146,399 RUB 75,393
    • LIS 12:20
      8h 20m
      Direct
      IAD 15:40
      Lisbon - Washington D.C. | Sat, Dec 19 | United Airlines
      RUB 75,780
      48% off
      RUB 146,399 RUB 75,780
    • LIS 12:20
      8h 20m
      Direct
      IAD 16:40
      Lisbon - Washington D.C. | Sun, Oct 25 | Lufthansa
      RUB 75,974
      48% off
      RUB 146,399 RUB 75,974
    • LIS 12:20
      8h 20m
      Direct
      IAD 15:40
      Lisbon - Washington D.C. | Tue, Nov 10 | United Airlines
      RUB 76,832
      48% off
      RUB 146,399 RUB 76,832
    • LIS 12:20
      8h 20m
      Direct
      IAD 15:40
      Lisbon - Washington D.C. | Sat, Dec 19 | Lufthansa
      RUB 76,845
      48% off
      RUB 146,399 RUB 76,845
    • LIS 13:00
      17h 25m
      1 stop
      WAS 14:00
      Lisbon - Washington D.C. | Sun, Oct 25 | Normal Airline
      Find more flights
      Find more flights
    • Cheapest nonstop
      LIS 10:55
      8h 50m
      Direct
      IAD 15:45
      Lisbon - Washington D.C. | Tue, Oct 27 | TAP Air Portugal
      RUB 56,990 RUB 153,862
      63% off
      63% off
      RUB 153,862 RUB 56,990
    • LIS 12:20
      8h 20m
      Direct
      IAD 16:40
      Lisbon - Washington D.C. | Tue, Oct 27 | United Airlines
      RUB 76,204 RUB 153,862
      50% off
      50% off
      RUB 153,862 RUB 76,204
    • LIS 11:55
      8h 20m
      Direct
      IAD 16:15
      Lisbon - Washington D.C. | Mon, Oct 26 | Lufthansa
      RUB 77,268 RUB 153,862
      50% off
      50% off
      RUB 153,862 RUB 77,268
    • LIS 11:25
      8h 50m
      Direct
      IAD 16:15
      Lisbon - Washington D.C. | Thu, Oct 29 | TAP Air Portugal
      RUB 86,518
      44% off
      RUB 153,862 RUB 86,518
    • LIS 12:20
      8h
      Direct
      IAD 15:20
      Lisbon - Washington D.C. | Sat, Oct 24 | Lufthansa
      RUB 88,042
      43% off
      RUB 153,862 RUB 88,042
    • LIS 16:45
      8h 50m
      Direct
      IAD 21:35
      Lisbon - Washington D.C. | Wed, Oct 28 | TAP Air Portugal
      RUB 89,348
      42% off
      RUB 153,862 RUB 89,348
    • LIS 11:40
      8h 30m
      Direct
      IAD 15:10
      Lisbon - Washington D.C. | Sat, Oct 24 | TAP Air Portugal
      RUB 90,230
      41% off
      RUB 153,862 RUB 90,230
    • LIS 16:45
      8h 50m
      Direct
      IAD 21:35
      Lisbon - Washington D.C. | Sun, Oct 25 | TAP Air Portugal
      RUB 105,962
      31% off
      RUB 153,862 RUB 105,962
    • LIS 08:20
      13h
      1 stop
      IAD 17:20
      Lisbon - Washington D.C. | Wed, Oct 28 | American Airlines
      RUB 36,022
      77% off
      RUB 153,862 RUB 36,022
    • LIS 13:00
      17h 25m
      1 stop
      WAS 14:00
      Lisbon - Washington D.C. | Sun, Oct 25 | Normal Airline
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      Find more flights

Displayed flight fares from Lisbon to Washington D.C. are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Trip.com Price Insights: Flights from Humberto Delgado Airport to Dulles International Airport

What is the cheapest month to fly from Humberto Delgado Airport to Dulles International Airport?

The data is based on the past 12 months and shows the average one-way ticket prices from Humberto Delgado Airport to Dulles International Airport for each month in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest one-way flights from Humberto Delgado Airport to Dulles International Airport are usually in October, with an average price of RUB 38,803. It is best to avoid December, when the average price can reach RUB 66,192.

RUB 66,192
RUB 52,498
RUB 38,803
RUB 25,109
    Cheapest
  • RUB 46,445
    May
  • RUB 56,790
    Jun
  • RUB 62,422
    Jul
  • RUB 58,921
    Aug
  • RUB 42,259
    Sep
  • RUB 38,803
    Oct
  • RUB 51,540
    Nov
  • RUB 66,192
    Dec
  • RUB 53,701
    Jan
  • RUB 54,732
    Feb
  • RUB 48,831
    Mar
  • RUB 43,761
    Apr

What is the cheapest day of the week to fly from Humberto Delgado Airport to Dulles International Airport?

The data is based on the past 12 months and shows the average ticket prices from Humberto Delgado Airport to Dulles International Airport for each day of the week in the Trip.com database.

Based on Trip.com's data from the past 12 months, the cheapest departure day from Humberto Delgado Airport to Dulles International Airport is Wednesday, with average prices usually lower than other days. Avoid departing on Tuesday as prices are typically highest on that day.

RUB 71,531
RUB 57,890
RUB 44,249
RUB 30,608
    Cheapest
  • RUB 57,743
    Mon
  • RUB 71,531
    Tue
  • RUB 44,249
    Wed
  • RUB 52,641
    Thu
  • RUB 51,101
    Fri
  • RUB 51,536
    Sat
  • RUB 64,178
    Sun

Which airline offers the cheapest flights from Humberto Delgado Airport to Dulles International Airport?

The cheapest airline flying from Humberto Delgado Airport to Dulles International Airport is easyJet (from RUB 29,009) among 10 carriers operating this route. Based on Trip.com's latest 7-day flight data.

easyJet
From RUB 29,009
Ryanair
From RUB 29,202
Iberia
From RUB 29,964
Air Europa
From RUB 31,669
TAP Air Portugal
From RUB 34,765
American Airlines
From RUB 34,994
Royal Air Maroc
From RUB 35,309
Finnair
From RUB 36,240
British Airways
From RUB 36,990
Air Transat
From RUB 37,280

Find more flights and airlines

What is the flight schedule from Humberto Delgado Airport to Dulles International Airport?

Check the schedule for flights from Lisbon to Washington D.C. and find the flight that best matches your travel plans.

Flight info.
Departure
Arrival
Weekly Schedule

  1. AA8543

    Humberto Delgado Airport

    08:25

    LIS

    1h 25m

    Direct

    10:50

    MAD

    S M T W T F -
    Search

  2. AA8552

    Madrid Barajas Airport

    12:50

    MAD

    9h 40m

    Direct

    16:30

    IAD

    S - T W T - -

  3. IB530

    Humberto Delgado Airport

    08:20

    LIS

    1h 25m

    Direct

    10:45

    MAD

    S M T W T F -
    Search

  4. AA8552

    Madrid Barajas Airport

    12:50

    MAD

    9h 40m

    Direct

    16:30

    IAD

    S - T W T - -

  5. IB540

    Humberto Delgado Airport

    06:35

    LIS

    1h 25m

    Direct

    09:00

    MAD

    S M T W T F S
    Search

  6. IB361

    Madrid Barajas Airport

    12:20

    MAD

    9h 10m

    Direct

    15:30

    IAD

    S - T W T F -

  7. AA8542

    Humberto Delgado Airport

    06:35

    LIS

    1h 25m

    Direct

    09:00

    MAD

    S M T W T F S
    Search

  8. AA8552

    Madrid Barajas Airport

    12:50

    MAD

    9h 40m

    Direct

    16:30

    IAD

    S - T W T - -

  9. IB540

    Humberto Delgado Airport

    06:35

    LIS

    1h 25m

    Direct

    09:00

    MAD

    S M T W T F S
    Search

  10. AA8552

    Madrid Barajas Airport

    12:50

    MAD

    9h 40m

    Direct

    16:30

    IAD

    S - T W T - -

  11. U27639

    Humberto Delgado Airport

    05:55

    LIS

    1h 25m

    Direct

    08:20

    MAD

    S M T W - - S
    Search

  12. AT973

    Madrid Barajas Airport

    13:00

    MAD

    1h 45m

    Direct

    13:45

    CMN

    S M T W T F S

  13. AT218

    Casablanca Mohammed V International Airport

    15:25

    CMN

    8h 40m

    Direct

    20:05

    IAD

    - - T - T - S

  14. IB1146

    Humberto Delgado Airport

    20:45

    LIS

    1h 25m

    Direct

    23:10

    MAD

    S M - - - - S
    Search

  15. IB361

    Madrid Barajas Airport

    12:20

    MAD

    9h 10m

    Direct

    15:30

    IAD

    S - T W T F -

  16. TP1022

    Humberto Delgado Airport

    21:00

    LIS

    1h 30m

    Direct

    23:30

    MAD

    S M T W T F -
    Search

  17. AT973

    Madrid Barajas Airport

    13:00

    MAD

    1h 45m

    Direct

    13:45

    CMN

    S M T W T F S

  18. AT218

    Casablanca Mohammed V International Airport

    15:25

    CMN

    8h 40m

    Direct

    20:05

    IAD

    - - T - T - S

  19. UX1160

    Humberto Delgado Airport

    20:05

    LIS

    1h 15m

    Direct

    22:20

    MAD

    S M T W T F S
    Search

  20. AT973

    Madrid Barajas Airport

    13:00

    MAD

    1h 45m

    Direct

    13:45

    CMN

    S M T W T F S

  21. AT218

    Casablanca Mohammed V International Airport

    15:25

    CMN

    8h 40m

    Direct

    20:05

    IAD

    - - T - T - S

  22. IB534

    Humberto Delgado Airport

    16:45

    LIS

    1h 25m

    Direct

    19:10

    MAD

    S - T W T - S
    Search

  23. IB361

    Madrid Barajas Airport

    12:20

    MAD

    9h 10m

    Direct

    15:30

    IAD

    S - T W T F -
Find more flights and airlines

About Humberto Delgado Airport and Dulles International Airport

Learn about Humberto Delgado Airport (LIS) and Dulles International Airport (IAD) — including location, terminals, transportation, and travel tips.

Flight distance 5,772.34km
Cheapest one-way ticket price RUB 29,964
Cheapest return ticket price RUB 42,504

FAQs for Humberto Delgado Airport to Dulles International Airport Flights

  • How long is the flight from Humberto Delgado Airport to Dulles International Airport?

    Humberto Delgado Airport to Dulles International Airport takes about 7 hours 59 minutes on average. Actual flight time may vary depending on route, weather and air traffic.
  • There are around 3 daily flights from Humberto Delgado Airport (LIS) to Dulles International Airport (IAD).
  • The earliest flight from Humberto Delgado Airport to Dulles International Airport departs at 10:55, and the last departs at 17:15, with about 3 flights per day. Flight times may change, so please check the latest departure and arrival times before you travel.
  • The route from Humberto Delgado Airport (LIS) to Dulles International Airport (IAD) is quite popular. Without considering departure times or holidays, tickets cost around RUB 94,547 in January, the most expensive month to book this route.
  • TAP Air Portugal is a very popular airline operating an average of 1190 flights per month.
  • One-way flights from Humberto Delgado Airport to Dulles International Airport currently start from RUB 29,964, and round-trip fares start from RUB 42,504. The current lowest fare is a Iberia flight departing on Fri, Nov 27; prices may vary depending on availability.
  • Yes. TAP Air Portugal and United Airlines operate direct flights from Humberto Delgado Airport to Dulles International Airport, with an average flight time of 7 hours 58 minutes, and around 21 weekly flights. Actual flight frequency may vary by season.
  • Based on Trip.com flight data for departures within the next 30 days with at most one stop, the average one-way price from Humberto Delgado Airport to Dulles International Airport is RUB 67,646. Prices may vary depending on the departure date, airline, and availability.
  • Jetblue Airways are the most popular budget airlines flying from Humberto Delgado Airport to Dulles International Airport, with one-way fares starting from RUB 29,964. Compare final prices carefully, as baggage, seat selection and payment fees may apply.
  • Humberto Delgado Airport to Dulles International Airport operates around 21 weekly flights, mainly by TAP Air Portugal and United Airlines. Actual frequency may vary during holidays and seasonal schedule adjustments.
  • Enter Humberto Delgado Airport and Dulles International Airport, select your departure date and number of passengers, then compare flights by price, flight duration, and baggage allowance. Once you've chosen a fare, review the change and refund rules, fill in passenger details, and pay to receive your booking confirmation.

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