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Cheap flights from London Heathrow Airport to Udon Thani from £322

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 17/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UTH
13 Jun — 20 Jun1
1 adult
1 adult, Economy, 0 bags

Cheap flight deals from Heathrow to Udon Thani

Enter your travel dates to find the best prices.

Cheapest flights from Heathrow to Udon Thani
Explore the most affordable flight options available from Heathrow to Udon Thani. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 14 May 2026.

Sun 27/914:40
LHR
-
UTH
2 stops23h 10m
Multiple Airlines
Fri 9/1009:00
UTH
-
LHR
2 stops33h 40m
Multiple Airlines
Deal found 9/5£640
Mon 2/1118:55
LHR
-
UTH
2 stops30h 05m
Multiple Airlines
Sun 22/1114:10
UTH
-
LHR
2 stops23h 15m
Multiple Airlines
Deal found 10/5£692
Wed 24/608:25
LHR
-
UTH
2 stops23h 00m
Multiple Airlines
Wed 1/721:25
UTH
-
LHR
2 stops21h 50m
Multiple Airlines
Deal found 10/5£699
Tue 16/622:05
LHR
-
UTH
2 stops33h 20m
Gulf Air
Sat 20/613:55
UTH
-
LHR
2 stops23h 00m
Gulf Air
Deal found 13/5£741
Tue 16/611:20
LHR
-
UTH
2 stops20h 05m
Turkish Airlines
Sat 20/613:55
UTH
-
LHR
2 stops32h 45m
Turkish Airlines
Deal found 10/5£995
Thu 25/612:30
LHR
-
UTH
1 stop15h 15m
Multiple Airlines
Thu 2/717:50
UTH
-
LHR
2 stops30h 20m
Multiple Airlines
Deal found 11/5£998

Find flight deals from Heathrow to Udon Thani

Discover tips and strategies to find the most affordable flight options for your journey from Heathrow (LHR) to Udon Thani (UTH). 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 14 May 2026.

Round-trip from

£640

One-way from

£322

Popular in

March

Cheapest in

September

Average price

£852
27/9-9/10
  • 27/9-9/10
  • 4 total stops
  • 56h 50m total
  • London to Udon Thani
Search Deals
17/9
  • 17/9
  • 2 total stops
  • 29h 05m total
  • London to Udon Thani
Search Deals
Highest demand for flights based on searches. 11% potential increase in price (£86 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease (£33 potential savings vs. average return price).
Search Deals
Average for round-trip flights in May 2026
Search Deals

Cheapflights Fare Finder

 
Customise your flight search to find flights from Heathrow to Udon Thani 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 14 May 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Udon Thani that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest return flight

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Wed 24/6

08:25-13:25

2 stops23h 00m

Udon Thani

Wed 1/7

21:25-13:15

2 stops21h 50m

£699

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Thu 25/6

16:00-20:55

2 stops22h 55m

Udon Thani

Thu 2/7

21:25-17:55

2 stops26h 30m

£699

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Tue 16/6

22:05-13:25

2 stops33h 20m

Udon Thani

Sat 20/6

13:55-06:55

2 stops23h 00m

£741
Fastest return journey

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Fri 31/7

21:45-20:55

2 stops17h 10m

Udon Thani

Fri 21/8

21:25-12:45

2 stops21h 20m

£1,026
Cheapest one-way

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Fri 18/9

22:05-13:25

2 stops33h 20m

£441

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Tue 15/9

21:05-08:30

2 stops29h 25m

£932

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Wed 16/9

21:05-09:10

2 stops30h 05m

£1,568

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Sat 19/9

06:50-08:30

2 stops19h 40m

£2,332
Fastest single journey

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Fri 18/9

21:35-19:50

1 stop16h 15m

£2,487

Flights are sorted by cheapest return flights first.

Deals found on 14/5

Sorted by cheapest first

Best time to book a flight from Heathrow to Udon Thani

Have a flexible travel schedule? Discover the best time to fly to Udon Thani 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 Udon Thani

What is the cheapest month to book a flight from London Heathrow Airport to Udon Thani?

Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Udon Thani (average of £759). Flying from London Heathrow Airport to Udon Thani in March is currently the most expensive (average of £1,368). 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.

How much does it cost for a return flight from London Heathrow Airport to Udon Thani?

Reviews of airlines servicing Udon Thani

Get insights into the airlines that provide service to Udon Thani. 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 Udon Thani. Reviews last updated 14 May 2026.
Read reviews from past customers who have flown with Thai Airways from London Heathrow Airport to Udon Thani. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Thai Airways
7.9
Good
401 reviews
Check prices

Boarding

7.9

Food

7.4

Comfort

7.7

Entertainment

6.9

Crew

8.4

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing
Thai Airways
7.9
Good
401 reviews
Thai Airways
7.9
Good
401 reviews
Check prices

Boarding

7.9

Food

7.4

Comfort

7.7

Entertainment

6.9

Crew

8.4

Overall

7.9

Reviews

1 / 20
10.0
Excellent

Virendra,Jan 2026

DEL - BKK

Having required wheel chair assistance, I received amazing service from the ground and cabin staff. Everything was a breeze. Flight was comfortable but the entertainment system was quite dated. The chicken noodles served was amazing

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Udon Thani. 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 Udon Thani from London Heathrow?

    Udon Thani (UTH) is the airport you will fly into if you book a flight from London Heathrow to Udon Thani. You should not have trouble finding flights to Udon Thani from London Heathrow; the airport handles an average of 0 inbound flights from London Heathrow per day. You should also have plenty of airline options to choose from since 1 airline has flights to the Udon Thani airport from London Heathrow. It is only a 2.0 mi journey from Udon Thani (UTH) to Udon Thani’s city center.

  • How long is the flight from London Heathrow Airport to Udon Thani?

    For as low as £741, Gulf Air can have you in Udon Thani from London Heathrow Airport in 33h 20m. There are 5827 mi between London Heathrow Airport and Udon Thani.

  • What is the cheapest airline to fly from London Heathrow Airport to Udon Thani round-trip?

    Our cheapest airline available from London Heathrow Airport to Udon Thani is Thai Airways. Our recent data shows that you can find tickets from as low as £731 on this airline. Users have found that Thai Airways is 18% cheaper than the other options available to this destination.

  • Can I find deals for flights from Heathrow to Udon Thani that include hotel bookings?

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

  • How can I find direct flights from Heathrow to Udon Thani?

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

  • Can I find deals for business class flights from Heathrow to Udon Thani?

    Yes. Cheapflights offers flight deals from Heathrow to Udon Thani 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 Udon Thani?

    Currently, September is the cheapest month in which you can book a flight from London Heathrow Airport to Udon Thani (average of £759). Flying from London Heathrow Airport to Udon Thani in March is currently the most expensive (average of £1,368). 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

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Top airline flying from Heathrow to Udon Thani

Discover the top airline that operate flights from Heathrow to Udon Thani. 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 14 May 2026.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest£731Average£832FlexibilityNo 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 Udon Thani?

Cheapflights helps you search for flights from Heathrow to Udon Thani 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 Udon Thani?

Cheapflights simply makes it quick and affordable to book flights from Heathrow to Udon Thani by bringing together all flight options from hundreds of airlines and agencies online — and put it in one place for you to choose from. Plus, Cheapflights is 100% free to use for all.

Can Cheapflights find flights from Heathrow to Udon Thani with no change fees?

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

Can Cheapflights notify me if prices for flights from Heathrow to Udon Thani become cheaper?

Not ready to book yet? You can track prices for flights from Heathrow to Udon Thani on Cheapflights with our Price Alert feature and get notified when better prices are available.

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