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🇧🇬 Sofia, Bulgaria

Sofia Airport (SOF)

Sofia Airport (SOF, LBSF) serves Sofia, Bulgaria. Flights leaving SOF left an average of 14.2 min late in the twelve months to April 2026, the 35th least delayed of 88 busy European airports. 8.6 million passengers used it in the twelve months to June 2026, most often flying to or from Vienna.

Delays at SOF

Average departure delay per flight: 14.2 min over the twelve months to April 2026. Delays were worst in September (19.4 min) and lightest in April (8.3 min).

Average departure delay per flight from SOF, all causes, by month. Green is the least delayed month, orange the most.
See the figures
MonthAverage departure delayDepartures
May 202511.4 min2,897
June 202514.1 min2,829
July 202518.3 min2,914
August 202517.8 min3,002
September 202519.4 min2,960
October 202515.5 min3,007
November 202510.6 min2,483
December 202513.1 min2,711
January 202617.8 min2,585
February 202612.7 min2,449
March 20269.8 min2,618
April 20268.3 min2,768

Air traffic flow restrictions held 0.0% of arrivals at SOF for more than 15 minutes in the twelve months to August 2026, most often because of airport capacity (52% of those delay minutes).

Departure delay counts every cause, from the airline to air traffic control, and is measured against the scheduled time. Source: EUROCONTROL Aviation Intelligence Portal, summarised by TripStow. EUROCONTROL does not endorse TripStow.

Passengers at SOF

8,639,409 passengers used SOF in the twelve months to June 2026, on 57,540 commercial flights.

Passengers by month at SOF, arrivals and departures together.
See the figures
MonthPassengersFlights
July 2025713,9294,891
August 2025764,4235,072
September 2025764,1265,077
October 2025767,9465,126
November 2025642,2424,282
December 2025716,8704,765
January 2026645,7894,557
February 2026644,1274,287
March 2026683,6864,547
April 2026745,7974,791
May 2026790,7645,133
June 2026759,7105,012

Eurostat publishes airport figures a few months behind. Source: Eurostat (CC BY 4.0), summarised by TripStow.

Busiest routes from SOF

  1. Vienna (VIE)413,620 passengers
  2. Frankfurt am Main (FRA)353,335 passengers
  3. London Stansted (STN)328,838 passengers
  4. Bergamo (BGY)306,355 passengers
  5. London Luton (LTN)295,894 passengers
  6. Munich (MUC)277,244 passengers
  7. Istanbul (IST)275,860 passengers
  8. Barcelona (BCN)223,731 passengers
  9. Varna (VAR)219,208 passengers
  10. Eindhoven (EIN)210,385 passengers

Passengers in 2024, both directions together. Source: Eurostat (CC BY 4.0), summarised by TripStow.

Questions and answers

How delayed are flights at Sofia (SOF)?
Flights leaving SOF left an average of 14.2 min late in the twelve months to April 2026, the 35th least delayed of 88 busy European airports.
Which month has the most delays at SOF?
September 2025, when flights left an average of 19.4 minutes late; the lightest month was April 2026 (8.3 minutes).
Why are flights delayed at SOF?
EUROCONTROL records why air traffic flow restrictions delay arrivals. At SOF in the last year the biggest cause was airport capacity (52% of those minutes), then other causes (48%).

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