Sofia to Istanbul flights
Routavio compares airline fares from several flight booking sites. The lowest one-way fare it found for Sofia to Istanbul is €36 (checked on 11 Nov 2026).
Your next trip, last seen at €36
Lowest observedWhen to fly
Explore datesMore dates worth a look
Find the dates that work for you
The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- 1 Dec€40
- 2 Dec€41
- 3 Dec€42
- 4 Dec€42
- 5 Dec€49
- 6 Dec€45
- 7 Dec€44
- 8 Dec€42
- 9 Dec€42
- 10 Dec€42
- 11 Dec€43
- 12 Dec€36
- 13 Dec€48
- 14 Dec€42
- 15 Dec€42
- 16 Dec€42
- 17 Dec€72
- 18 Dec€43
- 19 Dec€71
- 20 Dec€68
- 21 Dec€71
- 22 Dec€43
- 23 Dec€72
- 24 Dec€65
- 25 Dec€42
- 26 Dec€76
- 28 Dec€80
- 29 Dec€72
- 30 Dec€65
- 31 Dec€41
- Lowest observed
- €36, departing 12 Dec 2026 (Last checked: 11 Nov 2026)One-way fare · Priced departure days checked in the last 14 days: 116Check live prices for this route
- Round trip
- €74, departing 9 Dec 2026, back 13 Dec 2026 (Last checked: 12 Nov 2026)
- Non-stop, one way
- €40, departing 8 Dec 2026 (Last checked: 6 Nov 2026)
- Airlines seen
- Pegasus Airlines, Turkish Airlines, Aegean Airlines, Air Serbia, LOT Polish Airlines, Lufthansa, Ryanair (7)
- Fastest observed flight time
- 1h 15m
- Non-stop
- Yes
About this route
Explore the fares we observed from Sofia to Istanbul. Prices move often, so pick your dates to see the latest options.
- Route distance
- 505 km
- Fastest observed flight time
- 1h 15m
- Airlines seen
- Pegasus Airlines, Turkish Airlines, Aegean Airlines, Air Serbia, LOT Polish Airlines, Lufthansa, Ryanair (7)
- Alternative airports
- SAW
Route-level information; individual journeys vary.
A clearer picture of your fare
If the observed fare for this date drops, we will email you. At most one message a day.
Non-stop airlines seen on this route
| Airline | Non-stop days / priced days |
|---|---|
| Pegasus Airlines | 126 / 143 |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Sofia Airport (SOF) → Sofia, city gazetteer reference point (42.6977, 23.3219): ≈ 7 km.
- Sabiha Gökçen Airport (SAW) → Istanbul, city gazetteer reference point (41.0082, 28.9784): ≈ 30 km.
- Istanbul Airport (IST) → Istanbul, city gazetteer reference point (41.0082, 28.9784): ≈ 35 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest departure day we saw in December 2026 from Sofia to Istanbul: 12 Dec 2026, €36 (checked 11 Nov 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| November 2026 | €41 | 18 |
| December 2026 | €36 | 30 |
| January 2027 | €40 | 24 |
| February 2027 | €50 | 18 |
| March 2027 | €39 | 24 |
Lowest fare by day of the week
Cheapest Saturday departure we saw from Sofia to Istanbul: 12 Dec 2026, €36 (checked 11 Nov 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €40 | 18 |
| Tuesday | €39 | 18 |
| Wednesday | €41 | 17 |
| Thursday | €41 | 16 |
| Friday | €41 | 16 |
| Saturday | €36 | 15 |
| Sunday | €40 | 16 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Observed fares by departure date
| Departure | Fare | Seen on |
|---|---|---|
| €67 | 11 Nov 2026 | |
| €67 | 11 Nov 2026 | |
| €72 | 11 Nov 2026 | |
| €72 | 11 Nov 2026 | |
| €42 | 11 Nov 2026 | |
| €64 | 11 Nov 2026 | |
| €72 | 11 Nov 2026 | |
| €42 | 11 Nov 2026 | |
| €64 | 11 Nov 2026 | |
| €72 | 11 Nov 2026 | |
| €66 | 11 Nov 2026 | |
| €41 | 12 Nov 2026 | |
| €44 | 11 Nov 2026 | |
| €42 | 10 Nov 2026 | |
| €63 | 10 Nov 2026 | |
| €72 | 9 Nov 2026 | |
| €63 | 11 Nov 2026 | |
| €41 | 10 Nov 2026 | |
| €40 | 10 Nov 2026 | |
| €36 | 11 Nov 2026 |
One-way fares. Each row is one price we saw for that departure day on the date shown, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Sofia to Istanbul by days until departure (8 to 30 days): €36 (checked 11 Nov 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €42 | 8 |
| 8 to 30 days | €36 | 23 |
| 31 to 60 days | €40 | 29 |
| 61 days or more | €39 | 56 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Frequently asked
How much is a flight from Sofia to Istanbul?
The lowest fare Routavio has observed is €36, found on 11 Nov 2026.
Are there direct flights from Sofia to Istanbul?
Yes. Published schedules report non-stop flights on this route with Pegasus Airlines, Turkish Airlines.
Which airlines fly from Sofia to Istanbul?
Routavio has seen these carriers on the route: Pegasus Airlines, Turkish Airlines, Aegean Airlines, Air Serbia, LOT Polish Airlines, Lufthansa, Ryanair (7).
How long does the flight from Sofia to Istanbul take?
Across the 40 fares Routavio observed, the average journey time is 1h 15m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Sofia to Istanbul fares were non-stop?
40 of the 45 fares we observed were non-stop; the rest included at least one stop. That describes our observations, not every flight that operates.
How much is a round trip from Sofia to Istanbul?
Cheapest round trip: €74, departing 9 Dec 2026, back 13 Dec 2026 (checked 12 Nov 2026).
How much is a non-stop flight from Sofia to Istanbul?
Cheapest non-stop one-way fare: €40, departing 8 Dec 2026 (checked 6 Nov 2026).
Which airlines had non-stop offers on at least 3 departure dates from Sofia to Istanbul?
For Sofia to Istanbul, examples of observed one-way non-stop offers checked within the last 14 days: Pegasus Airlines (126). Each number counts distinct departure dates, not weekly flights; check current availability in search.
When is the cheapest month to fly from Sofia to Istanbul?
Cheapest departure day we saw in December 2026 from Sofia to Istanbul: 12 Dec 2026, €36 (checked 11 Nov 2026).
Which day of the week is cheapest from Sofia to Istanbul?
Cheapest Saturday departure we saw from Sofia to Istanbul: 12 Dec 2026, €36 (checked 11 Nov 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide · Price and schedule freshness on Routavio
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Recently observed fares. Prices may change.