Cheap Flights London to Istanbul 2026 — Fares, Airlines & Best Time to Book

London to Istanbul is a busy, well-served medium-haul route, and the good news is that almost everyone flies non-stop — the journey takes under four hours. The real decision is not the one you might expect. It is not full-service into Istanbul Airport (IST) versus budget into Sabiha Gökçen (SAW) on the Asian side, because the cheapest fares we can find are a budget carrier flying into IST: Wizz Air UK from Luton and Gatwick, from £78 return. This guide covers who flies the route, what a fair return costs in pounds, and how to get the best price.

Fares from London to Istanbul (GBP)

Istanbul is a year-round city break, so fares are driven by school holidays and the summer peak rather than the weather. The July–August summer, Christmas and Easter breaks are the priciest; late autumn and winter (outside the holidays) are the cheapest. The table below tracks demand through the year rather than a fare for each month. In the window we can price today the fares split cleanly in two, and there is no middle: eighty of the hundred cheapest returns were £78–£95, all of them Wizz Air UK into IST from Luton or Gatwick; the other twenty were £170–£187 — Pegasus to Sabiha Gökçen at a flat £170 and Turkish Airlines at £180–£187.

From our longer-run tracking of these airport pairs, a genuinely good return lands around £70–£100 on a budget carrier — Gatwick to IST has gone as low as £37 in fifty-six logged fares, and Stansted to Sabiha Gökçen as low as £82 in sixty-eight. In the live booking window the budget floor was £78 and the budget median £90, so £90-odd is the going rate rather than a find, and anything under about £80 is worth booking on the spot. Full-service returns with Turkish Airlines or British Airways usually run £160–£260; Turkish priced at £180–£187 in our sample. There is no £150 middle on this route — the fares cluster at the two ends.

Airlines on this route

Non-stop into Istanbul Airport (IST):

• Wizz Air UK — the cheapest way to Istanbul in every fare we priced, and it flies to the main airport, not the Asian one. It held 80 of the hundred cheapest returns: £78–£93 from Luton (a daily flight, seven a week, on the A321neo — and the only airline on that pair) and £86–£95 from Gatwick. Ultra-low-cost, so price the bag and seat you actually need.
• Turkish Airlines — the flag carrier, with the widest schedule from Heathrow and also flying Gatwick and Stansted; generous baggage and a good onward network if you are connecting. It priced at £180–£187 in our sample, and it flies the route fastest, from about 3h 35m.
• British Airways — non-stop from Heathrow, daily; a convenient full-service option with Avios earning. It did not appear at any price in the fares we sampled, which ranks that sample rather than the airline.

Non-stop into Sabiha Gökçen (SAW), on the Asian side:

• Pegasus Airlines — frequent low-cost flights from Stansted and Gatwick to Sabiha Gökçen. Worth checking, but do not assume it is the cheap option: in our sample every Pegasus return was a flat £170, more than twice the Luton fare and only £10 below full-service Turkish.
• AJet — Turkish Airlines’ low-cost arm, flying Stansted to Sabiha Gökçen. No AJet fare appeared in our sample, so we cannot rank it.

The budget saving is real but it belongs to one airline: Wizz Air UK undercut Turkish by about £90–£100 in our sample, while Pegasus undercut it by £10. And the airport trade-off does not line up with the price the way the route’s reputation suggests — the cheapest flights land at Istanbul Airport on the European side, so on this route you are not paying for convenience with a long transfer from the Asian side. Add any bag and transfer costs before you decide: on a light-baggage city break the budget fare wins comfortably, but for a bag-heavy trip the full-service all-in price can be close.

When to book & how to save

• Book 4–10 weeks ahead for a medium-haul city break like this — that is usually the sweet spot for price and choice.
• Avoid the July–August peak and the Easter and Christmas holidays, when fares and crowds are highest. Spring and autumn offer the best mix of price and mild weather.
• Compare the two Istanbul airports: IST (Wizz Air UK, Turkish, BA) is on the European side and closer to the old city; SAW (Pegasus, AJet) is on the Asian side and further out. Check the fare rather than assuming SAW is cheaper — in our sample it was not, by a wide margin.
• Travel light to win on budget fares: Pegasus and AJet headline prices exclude checked bags and sometimes cabin bags, so price the all-in fare with what you will actually carry.
• Be flexible on London airport — this is the biggest lever on the route: 48 of the hundred cheapest returns we priced left from Luton, 32 from Gatwick and 20 from Stansted, and Heathrow appeared only on return legs. Luton was the cheapest of the four.

Arriving in Istanbul

Which airport you land at makes a real difference. Istanbul Airport (IST) is on the European side, about 40 km north-west of the centre; the M11 metro plus a connection, or the HAVAIST airport bus, reaches Taksim/Sultanahmet in around an hour for a few pounds, while a taxi runs roughly £20–£30. Sabiha Gökçen (SAW) is on the Asian side, about 45 km south-east; the HAVABUS coach or the M4 metro links to the city, and a taxi to the European sights can cost £25–£40 and take over an hour in traffic. Check which airport your ticket uses before you book onward transport — they are on opposite sides of the city.

Frequently asked questions

Fare guidance based on aifly.one deal tracking and current airline schedules; last reviewed July 2026. Indicative economy returns — always check the live fare before booking.