Cheap Flights to Turkey Istanbul from London: Which Airport?

Key takeaways

• Stansted and Luton usually have the lowest base fares to Sabiha Gökçen, while Heathrow and Gatwick fly full-service into Istanbul Airport with bags included.
• Add a checked bag and the SAW transfer, and a full-service Heathrow fare often costs the same or less than the headline low-cost price.
• January and February are typically the cheapest months; July, August and late December can cost two to three times more.
• Booking roughly two to three months ahead is the practical sweet spot, with fares rising sharply inside the final two weeks.
• Flexible dates cut the fare more than any other tactic, followed by mixing departure and return airports and one-way splits.

The cheapest flights to Turkey Istanbul from London usually start from Stansted or Luton on a low-cost carrier into Sabiha Gökçen, but the headline fare lies: add a checked bag and a transfer into the city, and Heathrow to Istanbul Airport on a full-service airline often costs the same or less. "London" is really six departure markets, and each one has a different winner. This guide maps all six, with baggage-inclusive totals rather than teaser prices.

Which London airport usually has the cheapest flights to Istanbul?

Heathrow, Gatwick, Stansted and Luton all serve Istanbul nonstop; City and Southend effectively do not. The cheapest base fares usually come from Stansted and Luton, where low-cost carriers fly to Sabiha Gökçen (SAW) on the Asian side. Heathrow and Gatwick carry full-service carriers to Istanbul Airport (IST), with higher base fares but baggage and seat selection included.

The catch is the total: a £60 SAW fare can become the pricier option once you add a cabin bag and a checked case, plus the transfer into European Istanbul. Turkish Airlines publishes its IST schedule and baggage allowances on its route pages (Turkish Airlines), and Pegasus does the same for SAW, so you can check what the base fare excludes before comparing.

If you know the vibe but not the dates, describing the trip in plain language at TurnTrip surfaces fare differences per airport without opening six tabs.

When is the cheapest month to fly London to Istanbul?

January and February are usually the cheapest months to fly London to Istanbul. Demand drops after the holidays, temperatures are low, and airlines fill seats with fare cuts rather than tourists. Late November and early December, before the Christmas peak, often price similarly.

The most expensive windows are July and August, plus the last two weeks of December. School holidays pull UK families onto the route at the same time, and fares can run two to three times a January price for the same nonstop flight. Eid and half-term breaks create smaller spikes worth checking against your dates.

Shoulder months, especially April, May, late September and October, sit in the middle: mild weather in Istanbul, fares well below summer peaks, and more flight choices than winter. If your dates are flexible, shifting a summer trip to late September is usually the single biggest saving available.

Is a low-cost carrier to Sabiha Gökçen actually cheaper once baggage is added?

Usually yes, but the gap is smaller than the headline fare suggests. A low-cost fare to Sabiha Gökçen (SAW) can undercut a full-service fare to Istanbul Airport (IST) by £40-80 per person on base price, but the carrier charges separately for a checked bag, seat selection and sometimes cabin bags. Add a checked bag each way and roughly half that advantage disappears. Aggregator fare data for typical price ranges by month on the London-Istanbul route is worth checking before you assume the SAW fare wins: typical London-Istanbul fare ranges.

The Sabiha Gökçen transfer trade-off

SAW sits on the Asian side of the city, roughly 40-50 km from central Istanbul, and there is no metro link to the European side, so you are looking at a bus-plus-ferry combination, a shuttle, or a taxi of an hour or more depending on traffic. IST is farther out in absolute kilometres but has the M11 metro line, which changes the maths for anyone staying near a metro stop. Two travellers taking taxis each way can easily spend £30-50 more arriving into SAW than IST, which is real money against a fare saving of £80.

Worked example: couple with one checked bag each

Say a low-cost SAW fare is £70 return per person and a full-service IST fare is £130. The couple adds one checked bag each (£50-60 return per person on the low-cost carrier, usually included on the full-service fare), so the SAW total lands near £250-260 against £260 for IST. The saving has evaporated. If you travel with a cabin bag only, the low-cost option still wins outright, and the SAW transfer becomes the only real cost. The honest rule: the low-cost fare is cheaper if and only if you pack light and are willing to spend 60-90 minutes getting into town.

How do one-stop versus nonstop fares compare on this route?

Nonstop London-Istanbul flights take around 4 hours. One-stop itineraries, usually via hubs like Frankfurt, Vienna or Zurich, can come in £30-60 cheaper on the surface fare, but the connection adds 3-6 hours of travel time and a second boarding pass. The connection only wins on total trip cost in narrow cases: you travel with hand luggage only, you book a single ticket so the airline owns the connection risk, and you genuinely don't mind arriving at 11 PM instead of 6 PM. Add one checked bag and the low-cost leg of a split itinerary often erases the saving. If the one-stop option is on two separate tickets, treat it as a trap: a missed connection means buying a new fare at walk-up prices. For a couple of breaks a year, the 4-hour nonstop usually costs less per hour of holiday than the "cheaper" option.

How far in advance should you book London to Istanbul flights?

For a short-haul leisure route like this, roughly two to three months out is the practical sweet spot, with nonstop low-cost fares from Stansted or Luton often cheapest in that window and rising sharply inside the final two weeks. That is a pattern, not a law: fare-prediction folklore ("book on a Tuesday", "47 days exactly") has weak evidence behind it, and pricing varies by carrier, school holidays and how full a given flight already is.

Two caveats matter more than the calendar. First, booking early does not help if you land at Sabiha Gökçen and then pay for the longer transfer into the city, so check the ground-transport costs and journey times on the airport's own pages (Sabiha Gökçen airport transport) before deciding a cheaper fare is actually cheaper. Second, if your dates are fixed and a fare looks reasonable, take it; waiting for a dip you cannot predict is how evenings get wasted.

Which booking tactics (flexible dates, nearby airports, one-way splits) cut the fare most?

Ranked by how much they typically cut the fare on London to Istanbul:

1. Flexible dates. Shifting a Thursday departure to a Tuesday, or flying outside the school summer window, moves the price more than anything else on this route. Even one day either side can drop a fare noticeably in peak weeks.
2. Mixing airports. Fly out of Stansted or Luton with a low-cost carrier, come back into Heathrow or Gatwick. Departure and return are priced independently, so you can take the cheap half of each market. The trade-off is ground transport: a Stansted return costs less than a Heathrow one, and Sabiha Gökçen sits further from the city than Istanbul Airport.
3. One-way splits. Booking two singles on different airlines often beats a round-trip fare, especially when combining a low-cost outbound with a full-service return.

One-way splits and mixed carriers

Book each leg separately and you also dodge the worst part of round-trip low-cost fares: paying for a 20kg bag both ways when you only need it once. Check the total with bags before assuming the split wins.

Where each tactic fails

Date flexibility does nothing during fixed school holidays, when every day prices the same. Airport mixing backfires if the taxi or transfer to Sabiha Gökçen eats the fare difference. And one-way splits fall apart when a low-cost carrier cancels a leg, leaving you with no return protection on a separate ticket.

Which tools find the cheapest London-Istanbul fares without wasting an evening?

The 50-tabs-at-2-AM problem is real, and no tool fully solves it. Here is how each one handles the London-Istanbul run, judged against what actually costs you evenings: comparing six departure airports, baggage-inclusive totals, and IST-versus-SAW transfer times.

Running the same checklist through each tool

Skyscanner is fastest for the core question: whole-month views across all six London airports, so a March date at LTN versus LGW takes seconds. It will not baggage-adjust a Pegasus fare against a Turkish Airlines one, though.

Kayak adds price alerts and a "Hacker Fare" split of two one-ways, useful when out-and-back carriers differ. Same baggage blind spot.

Booking.com bundles flights with hotels, handy if you want one checkout, but its flight filters are shallower than the two above.

TurnTrip, ours, takes a plain-English brief ("family of four, 4 nights, October, prefer the European side") and returns a shortlist with baggage-inclusive totals and the SAW transfer trade-off flagged. Where it falls short: it will not surface every low-cost edge case a raw Skyscanner scan catches, and results are only as current as its partner feed, so verify the final fare before paying.

Whichever tool you use, check entry rules separately; UK passport holders need an e-Visa or visa-free entry depending on purpose, per the Republic of Türkiye e-Visa official site.

How do cheap London-to-Istanbul fares compare with other long-haul budget routes like Bangkok, Dhaka, Lahore, Jeddah and India?

Istanbul sits under five hours from all six London airports, so it competes with a different cost structure than the long-haul budget routes. Bangkok, Dhaka, Lahore, Jeddah and India all need a widebody, more fuel, and usually a one-stop itinerary through the Gulf or a hub like Istanbul itself, which pushes base fares several times higher than the London-Istanbul nonstops covered earlier in this guide.

That distance gap changes what a pound buys. On Istanbul, the fare is often the small part of the trip; hotels, transfers and the SAW-versus-IST choice move the total more than the flight does. On Bangkok or Lahore, the flight dominates the budget, so baggage-adjusted carrier comparisons matter far more.

Practically: if Istanbul and a long-haul destination cost similar totals once you add bags and transfers, Istanbul wins on trip length per pound. If the long-haul fare is genuinely cheap, it wins on experience per pound. Run both through the same total-cost maths before booking either.

FAQ

Do I need a visa to enter Turkey from the UK?

UK passport holders can enter visa-free for tourism or business stays of up to 90 days in any 180-day period. For other purposes, such as work or study, you need a visa arranged in advance through the Republic of Türkiye e-Visa system. Check the current rules for your travel purpose before booking, since entry requirements can change.

Is Sabiha Gökçen or Istanbul Airport better for getting into the city?

Istanbul Airport (IST) is usually better for travellers staying in European Istanbul, because the M11 metro line connects it to the city despite being farther out in kilometres. Sabiha Gökçen (SAW) sits on the Asian side with no metro link to the European side, so getting in means a bus-and-ferry combination, shuttle or taxi taking 60-90 minutes or more.

Can I fly to Istanbul from London Stansted or London City direct?

Stansted has direct low-cost flights to Sabiha Gökçen, and its fares are typically the cheapest on the route. London City has no nonstop service to Istanbul at all; every itinerary from LCY involves a connection through a hub such as Frankfurt, Vienna or Zurich, which adds 3-6 hours of travel time versus the roughly 4-hour nonstop.

How much is a checked bag on low-cost airlines to Istanbul?

A checked bag on a low-cost carrier to Sabiha Gökçen typically costs around £50-60 return per person, and carriers charge separately for seat selection and sometimes cabin bags too. Full-service carriers into Istanbul Airport include baggage and seat selection in the fare. Add a checked bag each way and roughly half the low-cost fare advantage disappears.

Are flights to Istanbul cheaper than flights from London to Lahore Pakistan or Dhaka?

Yes, usually by a wide margin. Istanbul is under five hours away and served by nonstops from four London airports, while Lahore and Dhaka need a widebody and typically a one-stop itinerary through the Gulf or a hub, pushing base fares several times higher. On those routes the flight dominates the budget; on Istanbul, hotels and transfers often cost more than the airfare.