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Cheap flights from London Heathrow Airport to Udon Thani from £307

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 21/2. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — UTH
14 Mar — 21 Mar1
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 12 February 2026.

Fri 12/617:00
LHR
-
UTH
2 stops20h 50m
Multiple Airlines
Wed 24/609:00
UTH
-
LHR
2 stops27h 30m
Multiple Airlines
Deal found 9/2£641
Wed 6/521:55
LHR
-
UTH
2 stops17h 00m
Multiple Airlines
Sat 16/513:55
UTH
-
LHR
2 stops22h 30m
Multiple Airlines
Deal found 9/2£707
Sun 1/321:50
LHR
-
UTH
2 stops32h 50m
Multiple Airlines
Sun 15/315:00
UTH
-
LHR
3 stops33h 55m
Multiple Airlines
Deal found 9/2£729
Sun 3/521:55
LHR
-
UTH
2 stops17h 00m
Multiple Airlines
Sat 16/521:25
UTH
-
LHR
2 stops22h 00m
Multiple Airlines
Deal found 9/2£733
Wed 1/420:50
LHR
-
UTH
2 stops18h 05m
Multiple Airlines
Sun 31/513:55
UTH
-
LHR
2 stops22h 35m
Multiple Airlines
Deal found 11/2£747
Mon 23/311:50
LHR
-
UTH
1 stop14h 50m
Multiple Airlines
Fri 22/520:20
UTH
-
LHR
2 stops28h 50m
Multiple Airlines
Deal found 11/2£753

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 12 February 2026.

Round-trip from

£641

One-way from

£307

Popular in

December

Cheapest in

October

Average price

£884
12/6-24/6
  • 12/6-24/6
  • 4 total stops
  • 48h 20m total
  • London to Udon Thani
Search Deals
21/2
  • 21/2
  • 3 total stops
  • 52h 05m total
  • London to Udon Thani
Search Deals
Highest demand for flights based on searches. 6% potential increase in price (£44 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease (£17 potential savings vs. average return price).
Search Deals
Average for round-trip flights in February 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 12 February 2026.
Use the filters below to find and compare flights from London Heathrow Airport to Udon Thani that are best for you.

Fly from

Heathrow

Fly to

Udon Thani

Route

Depart

Return

Price

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Fri 12/6

17:00-19:50

2 stops20h 50m

Udon Thani

Wed 24/6

09:00-06:30

2 stops27h 30m

£641

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Wed 6/5

21:55-20:55

2 stops17h 00m

Udon Thani

Sat 16/5

13:55-06:25

2 stops22h 30m

£707

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Sun 1/3

21:50-13:40

2 stops32h 50m

Udon Thani

Sun 15/3

15:00-17:55

3 stops33h 55m

£729

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Sun 3/5

21:55-20:55

2 stops17h 00m

Udon Thani

Sat 16/5

21:25-13:25

2 stops22h 00m

£733

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Wed 1/4

20:50-20:55

2 stops18h 05m

Udon Thani

Sun 31/5

13:55-06:30

2 stops22h 35m

£747

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Mon 23/3

09:05-20:25

2 stops28h 20m

Udon Thani

Fri 22/5

08:40-21:45

2 stops19h 05m

£759

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Sat 21/2

22:35-09:40

3 stops52h 05m

£307

LondonUdon Thani

LHR - UTH

LHRUTH

London Heathrow

Sat 21/2

21:35-20:25

1 stop15h 50m

£506

Flights are sorted by cheapest return flights first.

Deals found on 9/2

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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Udon Thani (average of £380). Flying from London Heathrow Airport to Udon Thani in January is currently the most expensive (average of £832). 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.

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 12 February 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
7.8
Good
382 reviews
Check prices

Overall

7.8

Boarding

7.9

Entertainment

6.8

Food

7.4

Crew

8.4

Comfort

7.6

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
7.8
Good
382 reviews
Thai Airways
7.8
Good
382 reviews
Check prices

Overall

7.8

Boarding

7.9

Entertainment

6.8

Food

7.4

Crew

8.4

Comfort

7.6

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.

  • 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 £697 on this airline. Users have found that Thai Airways is 16% 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, May is the cheapest month in which you can book a flight from London Heathrow Airport to Udon Thani (average of £380). Flying from London Heathrow Airport to Udon Thani in January is currently the most expensive (average of £832). 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 12 February 2026.
AirlineCheapestAverageFlexibilityOn-time
Thai AirwaysCheapest£697Average£784FlexibilityNo 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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