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Flights from Atlanta to Ontario Starting at £35

We've found these cheap flights for you. You can book one-way or return flight tickets.

  • One way
  • Round-trip

Crossed out prices are calculated based on the average price of the corresponding route on Trip.com.

Find the best time to fly from Atlanta to Ontario

We monitor flight fares to help you find the best deals effortlessly

Displayed prices are calculated based on the cheapest average weekly prices of the corresponding route on Trip.com.
Airlines Flying from Atlanta to Ontario

Compare prices, find the option that best suits your travel needs, and enjoy a comfortable journey with a trusted airline.

Frontier Airlines
From £35
Delta Air Lines
From £69
Sun Country Airlines
From £69
Southwest Airlines
From £72
Spirit Airlines
From £79
United Airlines
From £88
American Airlines
From £100
Alaska Airlines
From £126
Jetblue Airways
From £128
ANA airlines

Find more flights and airlines

Alternative Routes from Atlanta to Ontario

Searching for potential routes that might be cheaper and faster? Check out these alternative flights from Atlanta to Ontario.

  • Cheapest
    Frontier Airlines
    ATL
    12:47
    14h 12m
    1 transfer
    ONT
    23:59
    Hartsfield-Jackson Atlanta International Airport - Ontario International Airport
    Wed, May 8Frontier Airlines
    £35
  • Frontier Airlines
    ATL
    12:47
    14h 12m
    1 transfer
    ONT
    23:59
    Hartsfield-Jackson Atlanta International Airport - Ontario International Airport
    Wed, May 8Frontier Airlines
    £35
    Find More Flights

How do I find the cheapest flights?

  • When are flight tickets from Atlanta (ATL) to Ontario (ONT) the cheapest?

    Airlines adjust prices for flights from Atlanta to Ontario based on the date and time of your booking. By analyzing data from all airlines, on Trip.com, you can find the cheapest flight prices on Tuesdays, Wednesdays, and Saturdays.
  • How much are flights from Atlanta (ATL) to Ontario (ONT) cost?

    According to Trip.com's data, the lowest price is around £318.
  • What's the most popular airline for direct flights from Atlanta (ATL) to Ontario (ONT)?

    Alaska Airlines operates 1 direct flights from Atlanta (ATL) to Ontario (ONT).

Flight Information from Atlanta to Ontario

Cheapest direct flight price

£35

Cheapest return ticket price

£128

Cheapest month

February

Peak season for travel

September