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Flights from Karlsruhe to Sofia

Airlines operating flights from Karlsruhe to Sofia

Choose from 1 airlines flying from Karlsruhe to Sofia, including Ryanair, and . Ryanair currently offers the cheapest ticket on this route.

Find the cheapest direct flight options from Karlsruhe to Sofia over the next three months. Book one-way tickets from €19 and round-trip tickets from €35.

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

Flight details for Karlsruhe to Sofia

The distance between Karlsruhe and Sofia is 1,353.78km. It takes around 2 hours 15 minutes on average to fly from Karlsruhe to Sofia. Based on Trip.com's data, travel demand peaks in July. The off-season for travel is August.

Cheapest one-way flight price€19
Cheapest return ticket price€35
Off-season travel monthAugust
Peak season for travelJuly
Flight distance1,353.78km
Average flight time2 hours 15 minutes
Popular airlineRyanair

Find the best time to fly from Karlsruhe to Sofia

The cheapest time for Karlsruhe to Sofia flights: Jan 25 to Feb 1 — one way flight prices from €19.

Cheapest flights
From price
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  • 714
  • 1421
  • 2128
  • Jan

    284
  • 411
  • 1118
  • 1825
  • Feb

    251
  • 18
  • 815
  • 1522
  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Karlsruhe to Sofia, calculated over the upcoming 10 weeks.

Flight FAQs

  • Which airlines offer the cheapest flights from Karlsruhe (FKB) to Sofia (SOF)?

    Based on Trip.com data, Ryanair offers one-way fares as low as €19 on Cheapest nonstop routes (e.g. FKB to SOF on Thu, Dec 11), while Ryanair offers Cheapest nonstop round-trips from €35 departing on Thu, Jan 22 and returning on Thu, Jan 29.
  • At the moment, you can catch a direct flight from Karlsruhe to Sofia with the following airlines, including: Ryanair Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 2 hours 15 minutes to fly from Karlsruhe (FKB) to Sofia (SOF).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Karlsruhe to Sofia is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 3 flight per week flying from Karlsruhe to Sofia. You can check the weekly schedule for popular airlines on this route below: Ryanair: -/M/-/W/T/F/- -- FR5950 (18:11)
  • To find best deals on flights from Karlsruhe to Sofia, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Thu, Dec 11, with one-way flights priced at just €19.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Ryanair.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Sofia travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Karlsruhe to Sofia is August, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Karlsruhe to Sofia on December 11, 2025 with Ryanair, with prices starting at €18.
  • You can land at any one of the following hubs in Sofia, with Karlsruhe/Baden-Baden Airport to Sofia International Airport (FKB-SOF) is by far the most common option on this route: Sofia International Airport (SOF).
  • The time difference between Sofia and Karlsruhe is 1h.
  • Tickets can only be changed or cancelled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.