GTF - LHR

$897 Find Cheap Flights from Great Falls to London

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Great Falls to Heathrow departing on 5/12. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to London Heathrow Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Great Falls to London, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Great Falls to London, as well as popular online travel agencies
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Flights Deals

Cheap Flight Deals from Great Falls to London (GTF-LHR)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Great Falls to London that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Great Falls to Heathrow

KAYAK's recommended round-trip deals from the most popular airlines that fly from Great Falls to Heathrow.
Discover the best prices for you by selecting your travel dates on KAYAK.
Delta Logo
5:45 am - 9:50 amGTF-LHR
21h 05m1 stop
Delta Logo
6:30 am - 10:31 pmLHR-GTF
23h 01m2 stops
$897Delta
Find Deal
Mon, May 12 - Wed, May 28
Delta Logo
6:00 am - 1:10 pmGTF-LHR
24h 10m1 stop
Delta Logo
11:45 am - 10:31 pmLHR-GTF
17h 46m2 stops
$898Delta
Find Deal
Sun, May 11 - Wed, May 28
Delta Logo
6:00 am - 6:25 amGTF-LHR
17h 25m2 stops
Delta Logo
11:45 am - 8:32 pmLHR-GTF
15h 47m2 stops
$901Delta
Find Deal
Sun, May 11 - Tue, May 27
Delta Logo
5:45 am - 9:50 amGTF-LHR
21h 05m1 stop
Delta Logo
6:15 am - 5:36 pmLHR-GTF
18h 21m2 stops
$902Delta
Find Deal
Mon, May 12 - Thu, May 29
Delta Logo
6:19 pm - 9:50 amGTF-LHR
32h 31m1 stop
Delta Logo
6:15 am - 10:31 pmLHR-GTF
23h 16m2 stops
$903Delta
Find Deal
Sun, May 11 - Thu, May 29
United Airlines Logo
2:26 pm - 9:40 amGTF-LHR
12h 14m1 stop
United Airlines Logo
11:25 am - 9:10 pmLHR-GTF
16h 45m1 stop
$911United Airlines
Find Deal
Sun, May 11 - Thu, May 29
KLM Logo
11:45 am - 9:50 amGTF-LHR
15h 05m1 stop
KLM Logo
11:45 am - 10:31 pmLHR-GTF
17h 46m2 stops
$947KLM
Find Deal
Sat, May 10 - Fri, May 30
KLM Logo
11:45 am - 1:10 pmGTF-LHR
18h 25m2 stops
KLM Logo
11:45 am - 10:31 pmLHR-GTF
17h 46m2 stops
$951KLM
Find Deal
Sat, May 10 - Fri, May 30
 Logo
11:45 am - 1:10 pmGTF-LHR
18h 25m2 stops
 Logo
12:25 pm - 8:32 pmLHR-GTF
15h 07m1 stop
Sat, May 10 - Thu, May 29
 Logo
11:45 am - 8:55 amGTF-LHR
14h 10m2 stops
 Logo
9:55 am - 8:32 pmLHR-GTF
17h 37m2 stops
Sat, May 10 - Thu, May 29
Useful Info

KAYAK's insights & trends for Great Falls to Heathrow flights

Get data-powered insights and trends into flights from Great Falls to Heathrow to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Great Falls to London?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Great Falls to London were found on Delta ($897) and United Airlines ($911).

Good to know

Cheapest flight$897
Flight from Great Falls to London

When to book flights from Great Falls to Heathrow

Are your dates flexible? Find out the best times to travel from Great Falls to Heathrow based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Great Falls to London flights

  • What is the cheapest flight from Great Falls to London Heathrow Airport?

    In the last 3 days, the lowest price for a flight from Great Falls to London Heathrow Airport was $897 for a round-trip ticket.

  • Do I need a passport to fly between Great Falls and London?

    Yes

  • Which airports will I be using when flying from Great Falls to London?

    Great Falls and London are both served by 1 main airport. You will leave Great Falls from Great Falls and will be arriving at London Heathrow.

  • Which aircraft models fly most regularly from Great Falls to London?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Great Falls to London?

    SkyTeam, and Star Alliance are the airline alliances operating flights between Great Falls and London, with SkyTeam being the most commonly used for this route.

  • How does KAYAK find such low prices on flights from Great Falls to London?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Great Falls to London.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Great Falls to London?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to London from Great Falls is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Great Falls to London?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to London with an airline and back to Great Falls with another airline. Booking your flights between Great Falls and LHR can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Great Falls to London?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to London from Great Falls up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Top airline flying from Great Falls to Heathrow

 
See real verified KAYAK customer reviews for airlines flying from Great Falls to London. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Great Falls to Heathrow? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.4
United AirlinesOverall score based on 8696 reviews
7.7Boarding
7.3Comfort
6.6Food
7.1Entertainment
8.1Crew
Airline reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

10.0 ExcellentAnonymous, Apr 2025SFO - HKG
Read more United Airlines reviews

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

The plane pushed back from the gate on time. However, it stopped on the ramp, and we waited for over 20 minutes before the aircraft pulled back to the gate. Apparently, something of importance had to be removed from the aircraft by the gate agent. I found this to be odd. The delay was not significant, but I felt that whatever was on the aircraft that had to be taken off, should’ve been done before we pushed back from the gate.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

Electric plugs didn't work. Entertainment system wasn't working

Everything you need to know for your flight from Great Falls to Heathrow

Information on your arrival and departure airports

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