£537 Cheap Flights from London (LHR) to Great Falls (GTF)

View £537 flight on Tue, 6 Oct 2026Opens in a new window

Flight 1

Popular airlines from Heathrow Airport (LHR) to Great Falls, MT (GTF-Great Falls Intl.)

Cheap Flights from London (LHR) to Great Falls (GTF)

Prices were available within the past 7 days and start at £537 for one-way flights and £760 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£760 Return, found 1 day ago
£760
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £760 found 1 day ago
Alaska Airlines
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£799 Return, found 1 day ago
£799
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £799 found 1 day ago
KLM
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£825 Return, found 1 day ago
£825
Return
found 1 day ago
Select KLM flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £825 found 1 day ago
Air France
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£830 Return, found 1 day ago
£830
Return
found 1 day ago
Select Air France flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £830 found 1 day ago
Alaska Airlines
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£832 Return, found 1 day ago
£832
Return
found 1 day ago
Select Alaska Airlines flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £832 found 1 day ago
KLM
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£839 Return, found 1 day ago
£839
Return
found 1 day ago
Select KLM flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £839 found 1 day ago
KLM
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£849 Return, found 1 day ago
£849
Return
found 1 day ago
Select KLM flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £849 found 1 day ago
Air France
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£850 Return, found 1 day ago
£850
Return
found 1 day ago
Select Air France flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £850 found 1 day ago
Icelandair
Fri, 4 Sept - Sat, 19 Sept
LHR
London
GTF
Great Falls
£857 Return, found 1 day ago
£857
Return
found 1 day ago
Select Icelandair flight, departing Fri, 4 Sept from London to Great Falls, returning Sat, 19 Sept, priced at £857 found 1 day ago
Delta
Mon, 25 May - Mon, 1 Jun
LHR
London
GTF
Great Falls
£898 Return, found 2 days ago
£898
Return
found 2 days ago
Select Delta flight, departing Mon, 25 May from London to Great Falls, returning Mon, 1 Jun, priced at £898 found 2 days ago

Alternative airports near Great Falls

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Great Falls Intl. GTF. Cheapest and Closest option available. Average driving time to city centre is 8 minutes. Flights from £910
GTF
Great Falls Intl.
CheapestClosest
Average driving time to city centre8 min
Flights from £910

Frequently asked questions

How do I find cheap flights from London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
To find a cheap flight from London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.), 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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
There are approximately 23 connecting flights per day from London Heathrow (LHR) to Great Falls Intl. (GTF). Some common connection points include Schiphol (AMS), (DUB), and Keflavik Intl. (KEF).
What is the earliest flight from London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
The earliest flight from London Heathrow (LHR) to Great Falls, MT (GTF-Great Falls Intl.) typically departs at approximately 7:40 AM local time, operated by United Airlines. This is a seasonal service active in January. An early departure like this can help you maximize 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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
You'll typically find the most flights from London Heathrow (LHR) to Great Falls, MT (GTF) on a Wednesday, with around 39 flights available. This gives you a good selection of options for your travel plans. Major airlines on this route include Virgin Atlantic, United Airlines, and Air Canada.
What are the most popular departure times for flights from London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
The most popular departure times for flights from London Heathrow (LHR) to Great Falls, MT (GTF) are in the morning, from 9am to 12pm. About 40 CAD% of passengers prefer this time window. Many major carriers, including United Airlines, Delta Air Lines and Air Canada, offer flights during this window. This timing works well because it allows you to start your journey relatively early in the day, giving you more time to settle in at your destination upon arrival.
How long does it take to fly from London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
A flight from LHR to GTF with a layover takes around 13 hours 50 minutes, with the route covering approximately 4,475 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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
Select the "Business class" and "First class" filters when looking for LHR to GTF 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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.) flight with Expedia?
It's easy to earn miles on a London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.) 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 Great Falls from Heathrow (LHR)?
From Heathrow (LHR), you can fly into Great Falls Intl. (GTF) to reach Great Falls. Some flights may connect through major hubs like Los Angeles Intl. (LAX), John F. Kennedy Intl. (JFK), Pearson Intl. (YYZ) before reaching Great Falls. 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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.) at the last minute?
Typically, booking a last minute flight from London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.) 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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.) flight and hotel package?
Securing a London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.) 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 London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.)?
If you booked your London (LHR-Heathrow) to Great Falls, MT (GTF-Great Falls Intl.) 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
Heathrow
Destination airport
Great Falls Intl.
Airlines serving
Air France, Alaska Airlines, Delta, KLM, United
Return price
£760
Distance
7159 km

Book with confidence

Compare flights from London to Great Falls easily and book with confidence

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

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 Heathrow (LHR) to Great Falls Intl. (GTF)

The easiest way to view the best deals on flights from London to Great Falls 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 Heathrow to Great Falls Intl. start at just £760 and range up to £898.  

To find an even better deal, try  

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

Why you should book your London to Great Falls flight with Expedia!

We cater for all flight types, cabin classes and airlines. So whether you’re booking flights from Heathrow to Great Falls Intl. 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 London to Great Falls easily and book with confidence

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*Available to Expedia members.