Find flights
When to book
Airlines
FAQs

Cheap flights from London Heathrow Airport to Chiang Mai from £293

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 26/4. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — CNX
30 Mar — 6 Apr1
1 adult

Cheapflights Tip: The best prices from London Heathrow to Chiang Mai are usually found in October or February, booked 41 days in advance, depart on a Sunday or Monday and return on a Monday

Cheap flight deals from Heathrow to Chiang Mai

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Chiang Mai (CNX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated 25 March 2025.

Round-trip from

£500

One-way from

£293

Popular in

July

Cheapest in

October

Average price

£745
China Eastern
  • China Eastern
  • 6/5-17/5
  • 2 total stops
  • 67h 50m total
  • London to Chiang Mai
Search Deals
26/4
  • 26/4
  • 2 total stops
  • 30h 05m total
  • London to Chiang Mai
Search Deals
Highest demand for flights based on searches. 9% potential increase in price (£63 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease (£21 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

Find flight deals from Heathrow to Chiang Mai

Cheapest flights from Heathrow to Chiang Mai
Explore the most affordable flight options available from Heathrow to Chiang Mai. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 25 March 2025.

Tue 6/521:20LHR - CNX
1 stop34h 05mChina Eastern
Sat 17/514:55CNX - LHR
1 stop33h 45mChina Eastern
Deal found 24/3£500
Wed 23/422:10LHR - CNX
1 stop37h 40mChina Southern
Fri 2/518:50CNX - LHR
2 stops29h 15mChina Southern
Deal found 24/3£501
Wed 23/410:10LHR - CNX
2 stops29h 40mMultiple Airlines
Tue 13/509:20CNX - LHR
3 stops33h 20mMultiple Airlines
Deal found 24/3£509
Wed 23/422:40LHR - CNX
1 stop17h 10mAir China
Tue 13/523:05CNX - LHR
1 stop24h 40mAir China
Deal found 24/3£522
Sat 4/1011:00LHR - CNX
1 stop18h 40mMalaysia Airlines
Sat 18/1014:40CNX - LHR
1 stop31h 55mMalaysia Airlines
Deal found 24/3£636
Sun 18/520:55LHR - CNX
2 stops30h 25mEtihad Airways
Mon 26/520:00CNX - LHR
2 stops41h 00mEtihad Airways
Deal found 24/3£673
Fri 31/1021:15LHR - CNX
1 stop30h 10mChina Airlines
Tue 18/1111:25CNX - LHR
1 stop36h 30mChina Airlines
Deal found 24/3£708
Sat 19/420:10LHR - CNX
1 stop31h 35mCathay Pacific
Tue 13/519:25CNX - LHR
1 stop28h 50mCathay Pacific
Deal found 24/3£735
Tue 1/721:25LHR - CNX
1 stop17h 05mThai Airways
Fri 1/809:25CNX - LHR
1 stop15h 45mThai Airways
Deal found 24/3£774
Mon 21/409:00LHR - CNX
2 stops29h 30mLufthansa
Wed 14/516:55CNX - LHR
2 stops31h 30mLufthansa
Deal found 24/3£822

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow to Chiang Mai that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 March 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Chiang Mai that are best for you.

Fly from

Heathrow

Fly to

Chiang Mai

Route

Depart

Return

Price

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 6/5

21:20-13:25

1 stop34h 05m

Chiang Mai

Sat 17/5

14:55-18:40

1 stop33h 45m

£500

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 23/4

22:10-17:50

1 stop37h 40m

Chiang Mai

Fri 2/5

18:50-18:05

2 stops29h 15m

£501

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 23/4

10:10-21:50

2 stops29h 40m

Chiang Mai

Tue 13/5

09:20-12:40

3 stops33h 20m

£509

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 23/4

22:40-21:50

1 stop17h 10m

Chiang Mai

Tue 13/5

23:05-17:45

1 stop24h 40m

£522

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sun 18/5

20:55-09:20

2 stops30h 25m

Chiang Mai

Mon 26/5

20:00-07:00

2 stops41h 00m

£673

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Wed 23/4

11:00-13:40

1 stop20h 40m

Chiang Mai

Thu 8/5

14:40-16:35

1 stop31h 55m

£674

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 22/4

06:55-19:10

2 stops30h 15m

Chiang Mai

Wed 14/5

16:55-18:25

2 stops31h 30m

£723

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Sat 19/4

20:10-09:45

1 stop31h 35m

Chiang Mai

Tue 13/5

19:25-18:15

1 stop28h 50m

£735

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 1/7

21:25-20:30

1 stop17h 05m

Chiang Mai

Fri 1/8

09:25-19:10

1 stop15h 45m

£774

LondonChiang Mai

LHR - CNX

LHRCNX

London Heathrow

Tue 20/5

20:40-23:40

1 stop21h 00m

Chiang Mai

Sun 1/6

00:45-18:50

1 stop24h 05m

£1,073

Flights are sorted by cheapest return flights first.

Deals found on 24/3

Showing 1-10 of 16 results
1
2

Best time to book a flight from Heathrow to Chiang Mai

Have a flexible travel schedule? Discover the best time to fly to Chiang Mai from Heathrow with our price prediction graph.
Estimated return price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from London Heathrow Airport to Chiang Mai

How far ahead should I book a flight from London Heathrow Airport to Chiang Mai?

Use this chart to determine the optimal time to book a return flight from Heathrow to Chiang Mai. Price data was last updated on 21 March 2025.

The price you pay for your flight from London Heathrow Airport to Chiang Mai may vary depending on when you book. For the best chance of a lower fare, look to book 41 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest month to book a flight from London Heathrow Airport to Chiang Mai?

Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Chiang Mai (average of £776). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £1,403). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LHR to CNX?

Find hourly flight availability from Heathrow to Chiang Mai. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 25 March 2025.

It’s typically best to fly out from London Heathrow Airport to Chiang Mai at midday. Doing so could potentially save you 27% on the flight price compared to flying in the morning, which is usually more expensive.

Rainfall in Chiang Mai by month

Plan your trip to Chiang Mai by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Chiang Mai ranges from 0.0 - 250.0 inches per month. September is typically the wettest month, when rainfall can reach 250.0 mm. January is typically the driest time to visit Chiang Mai when rainfall is around 0.0 mm.

Temperature in Chiang Mai by month

Plan your trip to Chiang Mai by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Chiang Mai, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 29.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 21.0 C).

Reviews of airlines servicing Chiang Mai

Get insights into the airlines that provide service to Chiang Mai. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Chiang Mai. Reviews last updated 25 March 2025.
Read reviews from past customers who have flown Thai Airways, Cathay Pacific and SWISS from London to Chiang Mai. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Thai Airways
7.8
Good
316 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.3

Crew

8.3

Overall

7.8

Comfort

7.6

Reviews

1 / 17
10.0
Excellent

ROBERT,Nov 2024

SGN - BKK

Very professional crew and food were excellent and seats were comfortable. Good choice on screen and relaxed flight
Thai Airways
7.8
Good
316 reviews
Thai Airways
7.8
Good
316 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.3

Crew

8.3

Overall

7.8

Comfort

7.6

Reviews

1 / 17
10.0
Excellent

ROBERT,Nov 2024

SGN - BKK

Very professional crew and food were excellent and seats were comfortable. Good choice on screen and relaxed flight
Cathay Pacific
7.5
Good
833 reviews
Thai Airways
7.8
Good
316 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.3

Crew

8.3

Overall

7.8

Comfort

7.6

Reviews

1 / 17
10.0
Excellent

ROBERT,Nov 2024

SGN - BKK

Very professional crew and food were excellent and seats were comfortable. Good choice on screen and relaxed flight
SWISS
7.5
Good
1,569 reviews
Thai Airways
7.8
Good
316 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.3

Crew

8.3

Overall

7.8

Comfort

7.6

Reviews

1 / 17
10.0
Excellent

ROBERT,Nov 2024

SGN - BKK

Very professional crew and food were excellent and seats were comfortable. Good choice on screen and relaxed flight
Etihad Airways
7.4
Good
1,176 reviews
Thai Airways
7.8
Good
316 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.3

Crew

8.3

Overall

7.8

Comfort

7.6

Reviews

1 / 17
10.0
Excellent

ROBERT,Nov 2024

SGN - BKK

Very professional crew and food were excellent and seats were comfortable. Good choice on screen and relaxed flight
China Southern
7.4
Good
91 reviews
Thai Airways
7.8
Good
316 reviews
Check prices

Entertainment

6.9

Boarding

7.9

Food

7.3

Crew

8.3

Overall

7.8

Comfort

7.6

Reviews

1 / 17
10.0
Excellent

ROBERT,Nov 2024

SGN - BKK

Very professional crew and food were excellent and seats were comfortable. Good choice on screen and relaxed flight

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Chiang Mai. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Chiang Mai from London Heathrow?

    For a flight from London Heathrow to Chiang Mai, you will be flying into Chiang Mai. Chiang Mai (CNX) is just 1.9 mi from the center of the city. Chiang Mai is the only Chiang Mai airport and it handles 0 inbound flights from London Heathrow per day. 7 airlines have flights to Chiang Mai from London Heathrow on a regular basis.

  • What are the cheapest airlines flying from London Heathrow Airport to Chiang Mai round-trip?

    Flying on China Eastern is currently your cheapest option to Chiang Mai, with prices starting at £500. Additional return tickets that might be worth considering are offered by China Southern and Air China, with the lowest prices starting at £501 and £522, respectively. Users have found that China Eastern is 38% cheaper than the other options available to this destination.

  • What are the cheapest airlines to fly from London Heathrow Airport to Chiang Mai one-way?

    £353 is the cheapest one-way deal found within the past few days, from China Southern. You may also be able to find cheap deals on China Eastern and Etihad Airways, with prices starting from £402 and £410, respectively.

  • Can I find deals for flights from Heathrow to Chiang Mai that include hotel bookings?

    Yes. In addition to deals on Heathrow to Chiang Mai flights, Cheapflights offers holiday packages that include both flights and hotel.

  • How can I find direct flights from Heathrow to Chiang Mai?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Chiang Mai.

  • Can I find deals for business class flights from Heathrow to Chiang Mai?

    Yes. Cheapflights offers flight deals from Heathrow to Chiang Mai by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from London Heathrow Airport to Chiang Mai?

    Currently, April is the cheapest month in which you can book a flight from London Heathrow Airport to Chiang Mai (average of £776). Flying from London Heathrow Airport to Chiang Mai in July is currently the most expensive (average of £1,403). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Heathrow to Chiang Mai

See prices for flight routes from nearby airports that may be better suited for you.
Heathrow to Suvarnabhumi flights
Gatwick to Suvarnabhumi flights
London City to Suvarnabhumi flights
Stansted to Suvarnabhumi flights
Luton to Suvarnabhumi flights
Heathrow to Don Mueang Intl flights
Heathrow to Phuket City flights
Gatwick to Phuket City flights
Stansted to Phuket City flights
London City to Phuket City flights
Gatwick to Don Mueang Intl flights
Heathrow to Ko Samui flights
Gatwick to Ko Samui flights
Stansted to Ko Samui flights
Luton to Phuket City flights
London City to Ko Samui flights
Heathrow to Krabi flights
Gatwick to Chiang Mai flights
Stansted to Chiang Mai flights
London City to Chiang Mai flights
Gatwick to Krabi flights
Stansted to Krabi flights
London City to Krabi flights
Southend to Suvarnabhumi flights
Heathrow to Hat Yai flights
Luton to Ko Samui flights
Heathrow to Udon Thani flights
Heathrow to Chiang Rai flights
Heathrow to Rayong flights
Luton to Chiang Mai flights
Gatwick to Rayong flights
Heathrow to Surat Thani flights
Luton to Krabi flights
Gatwick to Khon Kaen flights
Gatwick to Chiang Rai flights
London City to Don Mueang Intl flights
Gatwick to Surat Thani flights
Heathrow to Trat flights
Southend to Krabi flights
Gatwick to Trat flights

Top 7 airlines flying from Heathrow to Chiang Mai

Discover the top 7 airlines that operate flights from Heathrow to Chiang Mai. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 25 March 2025.
AirlineCheapestAverageFlexibilityOn-time
China SouthernCheapest£436Average£474FlexibilityNo cancel feeOn-time69%
Search China Southern flights
China EasternCheapest£445Average£542FlexibilityNo cancel feeOn-time62%
Search China Eastern flights
Air ChinaCheapest£483Average£594FlexibilityNo cancel feeOn-time67%
Search Air China flights
Etihad AirwaysCheapest£619Average£675FlexibilityNo cancel feeOn-time75%
Search Etihad Airways flights
Malaysia AirlinesCheapest£638Average£794FlexibilityNo cancel feeOn-time67%
Search Malaysia Airlines flights
EVA AirCheapest£703Average£777FlexibilityNo cancel feeOn-time74%
Search EVA Air flights
Thai AirwaysCheapest£726Average£861FlexibilityNo cancel feeOn-time77%
Search Thai Airways flights

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Heathrow to Chiang Mai?

Cheapflights helps you search for flights from Heathrow to Chiang Mai via 900+ travel sites so you don’t have to. After performing a flight search, users can also filter their flight selection by filtering for price, number of stops, airlines, and so on.

Why should you use Cheapflights to find cheap flight tickets from Heathrow to Chiang Mai?

Cheapflights helps you find that perfect flight to Chiang Mai from Heathrow by searching from hundreds of airlines and agencies you know and love. We are also free to use, in case you were wondering!

Can Cheapflights find flights from Heathrow to Chiang Mai with no change fees?

Cheapflights does show flights with no change fees to all users. To see these options for flights from Heathrow to Chiang Mai, users can toggle the no change fees filter when performing a flight search.

Can Cheapflights notify me if prices for flights from Heathrow to Chiang Mai become cheaper?

Yes, Cheapflights offers price alerts on Heathrow to Chiang Mai flights so you can book your travel at the perfect time. Price Alerts can be enabled by clicking the bell icon next to the flight deals above and providing your email address where you want to receive the alerts.

100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.