London to Bangkok is one of the UK’s busiest long-haul leisure routes, and you have a real choice: fly non-stop in around 11½ hours, or save money on a one-stop itinerary through the Gulf or Europe. This guide covers who flies the route, what a fair return fare looks like in pounds, and when to book for the best price.
Route: London (LHR / LGW) → Bangkok Suvarnabhumi (BKK)
Distance: approximately 9,500 km (5,900 miles)
Non-stop flight time: about 11h 25m – 12h 00m eastbound
Direct flights: Yes — EVA Air and Thai Airways fly non-stop from Heathrow, and British Airways flies non-stop from Gatwick (year-round from 2026). One-stop options are usually cheaper.
Fares from London to Bangkok (GBP)
Bangkok is a year-round destination, but fares swing with Thailand’s seasons. The cool, dry high season (November–February) and the Christmas/New Year peak are the priciest; the green season (June–October) is the cheapest. The table below shows when the route is busiest. We no longer print per-month fare estimates here, because they were never measured.
| Month | Demand |
|---|---|
| January | high |
| February | high |
| March | medium-high |
| April | medium (Songkran) |
| May | medium |
| June | low |
| July | medium (school holidays) |
| August | medium |
| September | low |
| October | low-medium |
| November | high |
| December | very high |
We do not quote a target fare for this route. Our price tracking holds no recorded observations for it, so a “typical” or “good deal” figure here would be an estimate dressed up as a measurement — so this page leaves it out rather than guess. The seasonal pattern above is the part we can stand behind; check the live fare for the number.
Airlines on this route
Non-stop (about 11½ hours):
- EVA Air — non-stop Heathrow → Bangkok; consistently well-rated 5-star economy.
- Thai Airways — non-stop from Heathrow; the flag carrier, good hard product on the A350/787.
- British Airways — non-stop from Gatwick, now operating year-round (three times weekly in summer, more in winter).
One-stop (usually the cheapest, about 14–18 hours total):
- Emirates via Dubai — frequent, strong economy, from all three main London airports.
- Qatar Airways via Doha — often the best-value premium economy and a short hop from London.
- Etihad via Abu Dhabi, Turkish Airlines via Istanbul, and Gulf carriers via the Gulf hubs — often competitively priced.
Because the one-stop carriers compete hard, they usually undercut the non-stops by £50–£150. If time matters more than money, book a non-stop; if price is the priority, a single stop through Dubai, Doha or Istanbul is the sweet spot.
When to book & how to save
- Book 2–4 months ahead for the best balance of price and choice; long-haul fares to Bangkok rarely get cheaper in the last few weeks.
- Avoid the peaks if you can: Christmas/New Year and Thai New Year (Songkran, mid-April) are the most expensive and busiest.
- Fly in the green season (June–October) for the lowest fares — it rains in short bursts, not all day, and the crowds thin out.
- Be flexible on London airport: Heathrow has the non-stops, but a one-stop out of Gatwick or Stansted is often cheaper.
- Check checked-bag rules: Gulf and full-service carriers usually include 25–30 kg to Bangkok; the lowest “light” fares may not, so compare the all-in price.
Arriving in Bangkok
Most international flights land at Suvarnabhumi (BKK), about 30 km east of the city. The fastest way in is the Airport Rail Link to Phaya Thai (around 45 minutes, well under £2), or a metered taxi from the public rank (roughly £8–£12 to the centre, plus tolls). A handful of budget and regional flights use the older Don Mueang (DMK) airport to the north — check which one your ticket uses, as they’re on opposite sides of the city.
Frequently asked questions
How long is the flight from London to Bangkok?
Non-stop flights take about 11 hours 25 minutes to 12 hours eastbound (London to Bangkok). One-stop itineraries through Dubai, Doha or Istanbul typically take 14 to 18 hours in total, depending on the connection.
Are there direct flights from London to Bangkok?
Yes. EVA Air and Thai Airways fly non-stop from London Heathrow, and British Airways flies non-stop from London Gatwick (year-round from 2026). If you’d rather save money, one-stop flights with Emirates, Qatar Airways, Etihad or Turkish Airlines are usually cheaper than the non-stops.
How much does it cost to fly from London to Bangkok?
A typical economy return runs about £450–£850 depending on the season. The best one-stop deals dip to around £440–£500 in the green season (June–October), while non-stop fares and the December peak sit toward the top of that range.
What is the cheapest month to fly from London to Bangkok?
June, September and October are usually the cheapest months to fly. Avoid December, early January and mid-April (Songkran), which are the busiest and most expensive.
Which airlines fly from London to Bangkok?
Non-stop: EVA Air and Thai Airways from Heathrow, and British Airways from Gatwick. One-stop: Emirates (via Dubai), Qatar Airways (via Doha), Etihad (via Abu Dhabi), Turkish Airlines (via Istanbul) and several Gulf carriers, which are often competitive on price.
Which airport do I fly into in Bangkok?
Almost all long-haul flights land at Suvarnabhumi (BKK), Bangkok’s main international airport. Some budget and regional services use Don Mueang (DMK) instead — they’re on opposite sides of the city, so check your ticket before you book onward transport.
How far in advance should I book London to Bangkok flights?
Aim to book 2 to 4 months ahead. Long-haul fares to Bangkok tend to rise as departure approaches, especially around the November–February high season and the Christmas peak, so early booking almost always wins.
Is it cheaper to fly on weekdays?
Often, yes — midweek departures (Tuesday to Thursday) are usually a little cheaper than Friday–Sunday, and flying out and back on weekdays save a little on a return. Being flexible by a day or two is one of the easiest ways to cut the fare.
Route and schedule details from current airline schedules; last reviewed July 2026. Prices are indicative economy returns and change with demand — always check the live fare before booking.
