GTF - LHR

$628 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 1/31. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$628
United Airlines
Sat 1/31Sat 2/7
GTF - LHR • 1 stop
Cheapest one-way
Multiple Airlines
Thu 12/18
GTF - LHR • multi-stop
Top airlines
United Airlines
Cheapest • from $628 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
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We hope you love your trip to Heathrow!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Great Falls to Heathrow (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 Heathrow 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

Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
2:29 pm - 9:40 am
GTF
-
LHR
12h 11m1 stop
United Airlines Logo
6:35 am - 9:43 pm
LHR
-
GTF
22h 08m2 stops
$628United Airlines
Sun, Feb 1 - Sun, Feb 8
KLM Logo
1:12 pm - 1:50 pm
GTF
-
LHR
17h 38m2 stops
KLM Logo
8:25 pm - 5:30 pm
LHR
-
GTF
28h 05m2 stops
$629KLM
Sat, Jan 31 - Sat, Feb 7
United Airlines Logo
6:10 am - 11:15 am
GTF
-
LHR
22h 05m2 stops
United Airlines Logo
6:35 am - 9:43 pm
LHR
-
GTF
22h 08m2 stops
$633United Airlines
Fri, Jan 23 - Fri, Feb 6
Multiple Airlines Logo
1:12 pm - 10:00 am
GTF
-
LHR
13h 48m1 stop
Multiple Airlines Logo
6:20 am - 5:30 pm
LHR
-
GTF
18h 10m2 stops
$635Multiple Airlines
Fri, Jan 23 - Fri, Feb 6
Delta Logo
1:12 pm - 8:10 pm
GTF
-
LHR
23h 58m2 stops
Delta Logo
6:20 am - 5:30 pm
LHR
-
GTF
18h 10m2 stops
$640Delta
Fri, Jan 30 - Fri, Feb 6
United Airlines Logo
2:29 pm - 7:10 am
GTF
-
LHR
33h 41m2 stops
United Airlines Logo
4:40 pm - 9:43 pm
LHR
-
GTF
36h 03m2 stops
$642United Airlines
Fri, Jan 23 - Fri, Feb 6
Multiple Airlines Logo
5:59 pm - 7:10 am
GTF
-
LHR
30h 11m1 stop
Multiple Airlines Logo
2:55 pm - 5:19 pm
LHR
-
GTF
33h 24m1 stop
$657Multiple Airlines
Sun, Feb 1 - Sun, Feb 8
United Airlines Logo
2:29 pm - 9:40 am
GTF
-
LHR
12h 11m1 stop
United Airlines Logo
11:35 am - 1:48 pm
LHR
-
GTF
33h 13m1 stop
$744United Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
6:10 am - 9:40 am
GTF
-
LHR
20h 30m1 stop
United Airlines Logo
6:30 am - 9:53 pm
LHR
-
GTF
22h 23m2 stops
$840United Airlines
Thu, Jan 8 - Mon, Jan 12
United Airlines Logo
6:10 am - 10:50 am
GTF
-
LHR
21h 40m2 stops
United Airlines Logo
6:30 am - 9:53 pm
LHR
-
GTF
22h 23m2 stops
$844United Airlines
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 United Airlines ($628) and KLM ($629).

Which airlines fly non-stop between Great Falls and London Heathrow Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Great Falls to London Heathrow Airport.

There is just one airline that flies from Great Falls to London Heathrow Airport direct and that is United Airlines. The best round-trip deal found from United Airlines for the route is $645.

Find deals

Good to know

Cheapest flight$628
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 $628 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?

    Star Alliance is the only airline alliance operating flights between Great Falls and London.

  • 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 9091 reviews
8.1Crew
6.6Food
7.7Boarding
7.3Comfort
7.1Entertainment
Airline reviews

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

10.0 ExcellentRoger, Dec 2025
CAE - ORD
Read more United Airlines reviews

The flight was on time. I generally don’t drink or eat on short flights and the seats were good and the flight attendants were friendly. That’s all I expect

It was nice to have gotten up upgraded to first class with a meal on a three hour flight

Not great experience - we were super late boarding due to issues with aircraft. Then when we finally all got onboard and seated and they started taxiing out to the runway they just stopped then turned around and went back to the airport. Apparently the crew “ran out of time” to legally fly us. They mentioned that they were about 2 minutes away from taking off. I understand the rules and safety but kinda wonder why they would have bothered boarding us in the first place? Had to go all the way back and de plane and then wait in a HUGE line to get a hotel (this is somewhere around 2:30am) finally got to hotel by Uber (no shuttle after 20min so gave up) and they ended up putting us all back on the same aircraft at 10am next morning so got about 2.5 hours sleep. They did give us. $250 credit, but it was a São Paulo Brazil flight out of Dulles. The flight and everything was fine.

United overall experience is great these days. Airport experience was very organized. Staff on flight were great. App and information as good as it gets.

United have really come back. Airport and boarding process is clear and good, app and information also very good

They charged a fee for 1st bag checked. Others in same party were free.

Flight was delayed 8 times. We were sitting at the airport for 14 hours. We got 2 hours of sleep (if that) on what was not meant to be a red-eye.

The movies offered were great. Staff were very pleasant and very efficient.

After a delay at the gate, C3, at Ohare on Sunday, I left my Blk ski coat on the bench at the gate, lost! Please review my lob claim, thx.

Very bad! They kept delaying my flight and wouldn’t do anything about it

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

Information on your arrival and departure airports

Great Falls (GTF)
Heathrow (LHR)