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Flights from Kos to Sofia

What to know about flights from Kos to Sofia?

The approximate distance between Kos and Sofia is 727.8 km.

Cheapest one-way
HK$691
AEGEAN AEGEAN KGS-SOF 12h · 1 stop Wed, Nov 25
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Cheapest round-trip
HK$1,384
AEGEAN AEGEAN KGS-SOF 12h 35m · 2 stops Tue, Nov 10 - Sat, Nov 14
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Recommended airlines
AEGEAN AEGEANCheapest· From HK$691 AEGEAN AEGEANMost booked
Route details
727.8 km
Flight distance

Explore the cheapest one-way and round-trip flights from Kos to Sofia over the next 90 days, with one-way fares from HK$691 and round-trip from HK$1,384. Based on Trip.com's latest 7-day flight data.

    • Cheapest
      KGS 08:25
      12h
      1 stop
      SOF 20:25
      Kos - Sofia | Wed, Nov 25 | AEGEAN
      HK$691 HK$934
      26% off
      26% off
      HK$934 HK$691
    • Cheapest
      KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 24 | AEGEAN
      HK$691 HK$934
      26% off
      26% off
      HK$934 HK$691
    • KGS 08:25
      11h 45m
      1 stop
      SOF 20:10
      Kos - Sofia | Thu, Nov 19 | AEGEAN
      HK$729 HK$934
      22% off
      22% off
      HK$934 HK$729
    • KGS 20:35
      13h 50m
      1 stop
      SOF 10:25
      Kos - Sofia | Sun, Dec 20 | AEGEAN
      HK$730
      22% off
      HK$934 HK$730
    • KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 17 | AEGEAN
      HK$750
      20% off
      HK$934 HK$750
    • KGS 20:40
      13h 45m
      1 stop
      SOF 10:25
      Kos - Sofia | Sun, Dec 6 | AEGEAN
      HK$751
      20% off
      HK$934 HK$751
    • KGS 20:35
      13h 50m
      1 stop
      SOF 10:25
      Kos - Sofia | Thu, Dec 17 | AEGEAN
      HK$752
      19% off
      HK$934 HK$752
    • KGS 20:35
      14h 10m
      1 stop
      SOF 10:45
      Kos - Sofia | Sat, Dec 12 | AEGEAN
      HK$758
      19% off
      HK$934 HK$758
    • KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 10 | AEGEAN
      HK$764
      18% off
      HK$934 HK$764
    • KGS 13:00
      17h 25m
      1 stop
      SOF 14:00
      Kos - Sofia | Tue, Nov 10 | Normal Airline
      More cheap flights
      More cheap flights
    • KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 10 | AEGEAN
      SOF 21:00
      10h 45m
      1 stop
      KGS 07:45
      Sofia - Kos | Sat, Nov 14 | AEGEAN
      HK$1,384 HK$1,718
      19% off
      19% off
      HK$1,718 HK$1,384
    • KGS 08:25
      11h 45m
      1 stop
      SOF 20:10
      Kos - Sofia | Sun, Dec 6 | AEGEAN
      SOF 10:05
      3h 30m
      1 stop
      KGS 13:35
      Sofia - Kos | Wed, Dec 9 | AEGEAN
      HK$1,385 HK$1,718
      19% off
      19% off
      HK$1,718 HK$1,385
    • KGS 08:25
      11h 45m
      1 stop
      SOF 20:10
      Kos - Sofia | Sun, Nov 22 | AEGEAN
      SOF 21:00
      10h 45m
      1 stop
      KGS 07:45
      Sofia - Kos | Thu, Nov 26 | AEGEAN
      HK$1,393 HK$1,718
      19% off
      19% off
      HK$1,718 HK$1,393
    • KGS 20:35
      13h 50m
      1 stop
      SOF 10:25
      Kos - Sofia | Thu, Nov 19 | AEGEAN
      SOF 11:15
      5h 30m
      1 stop
      KGS 16:45
      Sofia - Kos | Mon, Nov 23 | AEGEAN
      HK$1,442
      16% off
      HK$1,718 HK$1,442
    • KGS 08:25
      11h 45m
      1 stop
      SOF 20:10
      Kos - Sofia | Thu, Dec 3 | AEGEAN
      SOF 11:20
      5h 25m
      1 stop
      KGS 16:45
      Sofia - Kos | Sun, Dec 6 | AEGEAN
      HK$1,450
      16% off
      HK$1,718 HK$1,450
    • KGS 20:35
      13h 50m
      1 stop
      SOF 10:25
      Kos - Sofia | Sun, Dec 13 | AEGEAN
      SOF 11:15
      8h 50m
      1 stop
      KGS 20:05
      Sofia - Kos | Fri, Dec 18 | AEGEAN
      HK$1,494
      13% off
      HK$1,718 HK$1,494
    • KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 17 | AEGEAN
      SOF 10:05
      3h 30m
      1 stop
      KGS 13:35
      Sofia - Kos | Wed, Nov 25 | AEGEAN
      HK$1,505
      12% off
      HK$1,718 HK$1,505
    • KGS 20:40
      13h 45m
      1 stop
      SOF 10:25
      Kos - Sofia | Sun, Nov 15 | AEGEAN
      SOF 10:05
      9h 55m
      1 stop
      KGS 20:00
      Sofia - Kos | Wed, Nov 18 | AEGEAN
      HK$1,512
      12% off
      HK$1,718 HK$1,512
    • KGS 08:25
      11h 45m
      1 stop
      SOF 20:10
      Kos - Sofia | Sat, Nov 28 | AEGEAN
      SOF 21:00
      10h 45m
      1 stop
      KGS 07:45
      Sofia - Kos | Tue, Dec 1 | AEGEAN
      HK$1,528
      11% off
      HK$1,718 HK$1,528
    • KGS 13:00
      17h 25m
      1 stop
      SOF 14:00
      Kos - Sofia | Tue, Nov 10 | Normal Airline
      SOF 15:00
      6h
      Nonstop
      KGS 16:00
      Sofia - Kos | Thu, Nov 12 | Normal Airline
      More cheap flights
      More cheap flights
    • KGS 08:25
      11h 45m
      1 stop
      SOF 20:10
      Kos - Sofia | Thu, Nov 19 | AEGEAN
      HK$729 HK$934
      22% off
      22% off
      HK$934 HK$729
    • KGS 08:25
      12h
      1 stop
      SOF 20:25
      Kos - Sofia | Wed, Nov 25 | AEGEAN
      HK$691 HK$934
      26% off
      26% off
      HK$934 HK$691
    • KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 24 | AEGEAN
      HK$691 HK$934
      26% off
      26% off
      HK$934 HK$691
    • KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 17 | AEGEAN
      HK$750
      20% off
      HK$934 HK$750
    • KGS 20:40
      12h 35m
      1 stop
      SOF 09:15
      Kos - Sofia | Tue, Nov 10 | AEGEAN
      HK$764
      18% off
      HK$934 HK$764
    • KGS 20:40
      13h 45m
      1 stop
      SOF 10:25
      Kos - Sofia | Sun, Dec 6 | AEGEAN
      HK$751
      20% off
      HK$934 HK$751
    • KGS 20:35
      13h 50m
      1 stop
      SOF 10:25
      Kos - Sofia | Sun, Dec 20 | AEGEAN
      HK$730
      22% off
      HK$934 HK$730
    • KGS 20:35
      13h 50m
      1 stop
      SOF 10:25
      Kos - Sofia | Thu, Dec 17 | AEGEAN
      HK$752
      19% off
      HK$934 HK$752
    • KGS 20:35
      13h 50m
      1 stop
      SOF 10:25
      Kos - Sofia | Thu, Dec 24 | AEGEAN
      HK$831
      11% off
      HK$934 HK$831
    • KGS 13:00
      17h 25m
      1 stop
      SOF 14:00
      Kos - Sofia | Tue, Nov 10 | Normal Airline
      More cheap flights
      More cheap flights

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

Which airlines are the most popular for Kos to Sofia flights?

You can choose from 1 airlines that fly from Kos to Sofia, including AEGEAN, AEGEAN has lowest fares on this route.
AEGEAN logo AEGEAN
Airlines are determined based on actual purchased flight tickets from Kos to Sofia according to previous 12 months data from Trip.com.

Frequently Asked Questions

  • What are the cheapest flights from Kos to Sofia (KGS-SOF)?

    Based on Trip.com data, AEGEAN offers one-way fares as low as HK$691 on Cheapest nonstop routes (e.g. KGS to SOF on Wed, Nov 25), while AEGEAN offers Cheapest nonstop round-trips from HK$1,384 departing on Tue, Nov 10 and returning on Sat, Nov 14.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Kos 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.
  • To find best deals on flights from Kos 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 Wed, Nov 25, with one-way flights priced at just HK$691.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is AEGEAN.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Get exclusive promo codes for Trip.com app users.
  • After crunching the numbers on our November flight calendar, it's currently cheapest to fly from Kos to Sofia on Wed, Nov 25 with AEGEAN, with prices starting at HK$691.
  • The time difference between Sofia and Kos is 0m.
  • Tickets can only be changed or canceled 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.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Kos to Sofia is HK$1,155. Fares vary by travel date, airline and availability.
  • Enter Kos and Sofia, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

Explore More Popular Flights

Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.