£356 Cheap Flights from Udon Thani (UTH) to London (LHR)

View £356 flight on Fri, 17 Jul 2026Opens in a new window

Popular airlines from Udon Thani (UTH-Udon Thani Intl.) to Heathrow Airport (LHR)

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Cheap Flights from Udon Thani (UTH) to London (LHR)

Prices were available within the past 7 days and start at £356 for one-way flights and £754 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£754 Return, found 5 hours ago
£754
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £754 found 5 hours ago
Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£756 Return, found 5 hours ago
£756
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £756 found 5 hours ago
Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£809 Return, found 5 hours ago
£809
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £809 found 5 hours ago
Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£811 Return, found 5 hours ago
£811
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £811 found 5 hours ago
Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£813 Return, found 5 hours ago
£813
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £813 found 5 hours ago
Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£815 Return, found 5 hours ago
£815
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £815 found 5 hours ago
Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£817 Return, found 5 hours ago
£817
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £817 found 5 hours ago
Thai Airways International
Wed, 6 May - Thu, 14 May
UTH
Udon Thani
LHR
London
£819 Return, found 5 hours ago
£819
Return
found 5 hours ago
Select Thai Airways International flight, departing Wed, 6 May from Udon Thani to London, returning Thu, 14 May, priced at £819 found 5 hours ago
Thai Airways International
Mon, 7 Sept - Tue, 22 Sept
UTH
Udon Thani
LHR
London
£826 Return, found 1 day ago
£826
Return
found 1 day ago
Select Thai Airways International flight, departing Mon, 7 Sept from Udon Thani to London, returning Tue, 22 Sept, priced at £826 found 1 day ago
Turkish Airlines
Mon, 7 Sept - Tue, 22 Sept
UTH
Udon Thani
LHR
London
£2,047 Return, found 1 day ago
£2,047
Return
found 1 day ago
Select Turkish Airlines flight, departing Mon, 7 Sept from Udon Thani to London, returning Tue, 22 Sept, priced at £2,047 found 1 day ago

Frequently asked questions

How much does a flight from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) cost?
One-way flights typically cost between £622 and £2,357 and return flights often range between £622 and £2,357. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Anaa (AAA) to Toronto, ON (YYZ-Pearson Intl.) ticket fares go up or down.
How do I find cheap flights from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
To find a cheap flight from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
How many flights per day from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
There are approximately 3 connecting flights per day from Udon Thani Intl. (UTH) to London Heathrow (LHR). A common connection point is Suvarnabhumi Intl. (BKK).
What is the earliest flight from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
The earliest flight from Udon Thani (UTH) to London Heathrow (LHR) typically departs at approximately 8:40 AM local time, operated by Thai Airways. This is a seasonal service active in April. An early departure like this can help you make the most of your time at your destination. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What day of the week has the most flights from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
You'll typically find the most flights from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) on a Sunday, with around 3 flights available. This gives you several flight options for your travel plans. The main airline on this route is Thai Airways.
What are the most popular departure times for flights from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
The most popular departure times for flights from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) are in the late evening, from 9pm to midnight. About 96% of passengers prefer this time window. Many major carriers, including Thai Airways, Qatar Airways and Oman Air, offer flights during this window. These times work well because you can maximise your time in Udon Thani before your evening flight, and you'll arrive in London in the morning ready to explore.
How long does it take to fly from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
A flight from UTH to LHR with a layover takes around 16 hours 50 minutes, with the route covering approximately 5,832 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
Select the "Business class" and "First class" filters when looking for UTH to LHR flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) flight with Expedia?
It's easy to earn miles on a Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia. *Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for London from Udon Thani Intl. (UTH)?
From Udon Thani Intl. (UTH), you can fly directly into Heathrow (LHR) to reach London. Some flights may connect through major hubs like Suvarnabhumi Intl. (BKK) before reaching London. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) at the last minute?
Typically, booking a last minute flight from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) flight and hotel package?
Securing a Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow)?
If you booked your Udon Thani (UTH-Udon Thani Intl.) to London (LHR-Heathrow) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Udon Thani Intl.
Destination airport
Heathrow
Airlines serving
Thai Airways International
Return price
£754
Distance
9329 km

Book with confidence

Compare flights from Udon Thani to London easily and book with confidence

For travelling on business or for pleasure, Expedia makes it easy to book your flights from Udon Thani to London. Operating between them flights per day, 20 airlines cover the route. And fly direct, getting you to Heathrow in just hours. If you have a preferred carrier, use our advanced search tool to find the right flight from Udon Thani Intl. to Heathrow.  

To make things even better, in the advanced search, you can also choose to fly economy, premium economy, business or first class, select your maximum number of stops, and pick your preferred departure and arrival time. You can also opt for refundable and direct flights. 

Grab a great deal on your flight from Udon Thani Intl. (UTH) to Heathrow (LHR)

The easiest way to view the best deals on flights from Udon Thani to London today is to enter your travel dates and hit search. From here, you can sort your results by price to see the cheapest flights first. Right now, return flights from Udon Thani Intl. to Heathrow start at just £754 and range up to £2,047.  

To find an even better deal, try  

  • being flexible on your dates – midweek flights can be cheaper
  • looking for other airports near Udon Thani and London
  • booking your flight during May, the cheapest month on this route
  • varying your flight times – early morning and late at night are sometimes cheaper 

Why you should book your Udon Thani to London flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Udon Thani Intl. to Heathrow for a budget break or a business trip with a bit of pleasure thrown in, we make it easy to secure the seat that’s right for you.  

Thanks to our supersized inventory that offers great choice all in one place, you know you’ll get a great deal with Expedia. Especially if you bundle your flight together with your hotel, you will unlock amazing savings. For added peace of mind, you can choose flexible bookings or filter to find refundable options, so you won’t pay a fee to change your flight.  

Compare flights from Udon Thani to London easily and book with confidence

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