GTF - LHR

$333 Find Cheap Flights from Great Falls to London

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Great Falls to Heathrow departing on 9/14. 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
1 adult, Economy

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 Flights 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Great Falls to Heathrow

Mon, Sep 29 - Wed, Oct 8
Delta Logo
1:05 pm - 9:50 amGTF-LHR
13h 45m1 stop
Delta Logo
6:15 am - 5:29 pmLHR-GTF
18h 14m2 stops
$578Delta
Find Deal
Mon, Sep 29 - Wed, Oct 8
Delta Logo
6:11 pm - 6:25 amGTF-LHR
29h 14m2 stops
Delta Logo
6:15 am - 5:29 pmLHR-GTF
18h 14m2 stops
$583Delta
Find Deal
Mon, Sep 29 - Wed, Oct 8
KLM Logo
1:05 pm - 9:50 amGTF-LHR
13h 45m1 stop
KLM Logo
11:00 am - 11:06 pmLHR-GTF
19h 06m1 stop
$585KLM
Find Deal
Tue, Sep 30 - Wed, Oct 8
KLM Logo
1:05 pm - 2:15 pmGTF-LHR
18h 10m2 stops
KLM Logo
11:00 am - 5:29 pmLHR-GTF
13h 29m1 stop
$590KLM
Find Deal
Tue, Sep 30 - Wed, Oct 8
United Airlines Logo
2:31 pm - 6:30 amGTF-LHR
32h 59m2 stops
United Airlines Logo
7:25 am - 9:11 pmLHR-GTF
20h 46m2 stops
$631United Airlines
Find Deal
Mon, Sep 29 - Wed, Oct 8
United Airlines Logo
7:00 am - 11:45 amGTF-LHR
21h 45m2 stops
United Airlines Logo
7:25 am - 9:11 pmLHR-GTF
20h 46m2 stops
$636United Airlines
Find Deal
Tue, Sep 30 - Wed, Oct 8
United Airlines Logo
2:31 pm - 9:40 amGTF-LHR
12h 09m1 stop
United Airlines Logo
2:50 pm - 9:11 pmLHR-GTF
13h 21m1 stop
$645United Airlines
Find Deal
Mon, Sep 29 - Wed, Oct 8
United Airlines Logo
7:00 am - 12:20 pmGTF-LHR
22h 20m1 stop
United Airlines Logo
2:50 pm - 9:11 pmLHR-GTF
13h 21m1 stop
$646United Airlines
Find Deal
Sat, Sep 13 - Sat, Sep 20
Delta Logo
5:40 am - 1:10 pmGTF-LHR
24h 30m2 stops
Delta Logo
3:15 pm - 12:25 pmLHR-GTF
28h 10m2 stops
$694Delta
Find Deal
Sat, Sep 13 - Sat, Sep 20
United Airlines Logo
7:00 am - 12:20 pmGTF-LHR
22h 20m1 stop
United Airlines Logo
7:25 am - 1:37 pmLHR-GTF
37h 12m2 stops
$731United Airlines
Find Deal
Booking Insights

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 ($578) and KLM ($585).

Good to know

Cheapest flight$333
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 $333 for a one-way ticket and $578 for a round-trip.

  • 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.

Reviews of the 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 8896 reviews
8.1Crew
7.7Boarding
7.1Entertainment
7.3Comfort
6.6Food
Airline reviews

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

8.0 ExcellentHal, Jul 2025IAD - MSY
Read more United Airlines reviews

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

the delay for 3 hours was understandable due to weather conditions but the flight should’ve provided some on flight compensations or at least provide more food.

Weather delay in Chicago?. No sense of urgency to make connection in Chicago for our connecting flight that wasn't delayed. Connection was missed.

Our flight was understandably diverted to a small regional airport in Laramie, Wyoming due to weather conditions, which I fully recognize and appreciate. However, the low rating stems from the experience that followed: passengers remained on board for over an hour without the option to deplane and stretch, despite the aircraft being stationary. Although the pilot opened the cabin door, only he was permitted to exit. Meanwhile, passengers grew increasingly uncomfortable as warm summer air entered the cabin through the open door, and being in the second row meant we were impacted immediately. While the flight attendants made efforts to keep everyone at ease, I believe allowing passengers to deplane briefly, given the extended delay, would have significantly improved the overall experience.

I never flew. Flight was canceled. DIA worst airport in the country. Avoid at all costs.

I learned that seating towards the end of plane that a line forms for the restroom and people use your chair as a hand railing, bumping your seat consistently. I was seated in the aisle. I think that next time if I am towards the back row I would want to sit in the middle or window seat.

The best airline I have ever travel , really good customer service, attention and service !!

United could have one single once of customer service. No human United employee would help me with the invalid mileage plus number, they said I had to speak with the computer.

United sent me a mileage plus number last year but that number is invalid so I can’t use it to check into flights or collect mileage. There is human to speak about the problem, only computers who keep asking me if I am using the correct email. It’s so frustrating and I cannot resolve it.

It was delayed instead of departing at 9:20pm, we departed at 11pm… putting us in Columbus after 2am! It was awful. Had I known about the delay, I could have spent some time in the United Lounge… I was starving because I started my journey in Budapest… so I was exhausted and hungry. Plus I had to make new arrangements to be picked up at the airport in Columbus, instead of midnight it was 2:30 am after getting luggage and out of airport. Not feasible. I would have just stayed in Chicago for the night and gotten a morning flight.

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

Information on your arrival and departure airports

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