GTF - LHR

$848 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 4/10. 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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41.299.237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$848
United Airlines
Fri 4/10Wed 5/13
GTF - LHR • 2 stops
Top airlines
United Airlines
Cheapest • from $848 (round-trip)
United Airlines
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Great Falls and Heathrow. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Denver (DEN)
Cheapest • Avg $1,000 (round-trip)
Denver (DEN)
Shortest trip • 12h 09m (one-way)
Insights
Insights
Insights
Insights
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
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

Fri, Apr 10 - Wed, May 13
United Airlines Logo
2:30 pm - 6:35 am
GTF
-
LHR
57h 05m
2 stops
United Airlines Logo
9:00 am - 1:34 pm
LHR
-
GTF
35h 34m
2 stops
$848United Airlines
Fri, Apr 10 - Wed, May 20
United Airlines Logo
2:30 pm - 6:35 am
GTF
-
LHR
57h 05m
2 stops
United Airlines Logo
9:30 am - 9:34 pm
LHR
-
GTF
43h 04m
2 stops
$856United Airlines
Fri, Apr 10 - Wed, May 20
United Airlines Logo
2:30 pm - 6:35 am
GTF
-
LHR
57h 05m
2 stops
United Airlines Logo
11:25 am - 9:18 pm
LHR
-
GTF
16h 53m
1 stop
$876United Airlines
Sun, Apr 26 - Sun, May 3
United Airlines Logo
2:30 pm - 12:35 pm
GTF
-
LHR
15h 05m
1 stop
United Airlines Logo
2:05 pm - 9:18 pm
LHR
-
GTF
38h 13m
2 stops
$898United Airlines
Sun, Apr 26 - Sun, May 3
United Airlines Logo
6:15 am - 10:00 am
GTF
-
LHR
20h 45m
2 stops
United Airlines Logo
9:30 am - 9:18 pm
LHR
-
GTF
42h 48m
2 stops
$901United Airlines
Sun, Apr 26 - Sun, May 3
United Airlines Logo
2:30 pm - 12:35 pm
GTF
-
LHR
15h 05m
1 stop
United Airlines Logo
2:50 pm - 9:18 pm
LHR
-
GTF
13h 28m
1 stop
$918United Airlines
Tue, Mar 31 - Thu, Apr 30
United Airlines Logo
2:30 pm - 9:40 am
GTF
-
LHR
12h 10m
1 stop
United Airlines Logo
6:55 am - 9:18 pm
LHR
-
GTF
21h 23m
2 stops
$971United Airlines
Tue, Mar 31 - Thu, Apr 30
United Airlines Logo
6:15 am - 6:30 am
GTF
-
LHR
17h 15m
2 stops
United Airlines Logo
7:25 am - 9:18 pm
LHR
-
GTF
20h 53m
2 stops
$974United Airlines
Tue, Mar 31 - Thu, Apr 30
United Airlines Logo
6:15 am - 6:30 am
GTF
-
LHR
17h 15m
2 stops
United Airlines Logo
7:25 am - 9:18 pm
LHR
-
GTF
20h 53m
2 stops
$975United Airlines
Tue, Mar 31 - Thu, Apr 23
United Airlines Logo
2:30 pm - 9:40 am
GTF
-
LHR
12h 10m
1 stop
United Airlines Logo
7:30 am - 9:17 pm
LHR
-
GTF
20h 47m
2 stops
$982United 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 ($848) and KLM ($1,046).

Find deals

Good to know

Cheapest flight$848
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 $848 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 9428 reviews
8.1Crew
6.6Food
7.3Comfort
7.1Entertainment
7.7Boarding
Airline reviews

Both my flight where delayed Had 25min to make it to my transfer flight

4.0 OkayAnonymous, Mar 2026
BGR - EWR
Read more United Airlines reviews

Both my flight where delayed Had 25min to make it to my transfer flight

Everything was on time and service on the flight was great!

Wifi Bluetooth features for watching in flight movie was horrible. Screen kept blacking out no connection of sound although it said connected. Other than that smooth trip .

The 777’s economy seat’s legroom was more tolerable than expected. I appreciate the reclining mechanism which slides the seat forward to minimize cannibalizing the space behind. The food was terrible: very salty.

The travel company that you have on your site did me so wrong. I don’t know how it happened, but they put my son‘s name on my plane ticket flying to Vietnam. Along with his birthday. They would not have let me fly from Fort Myers to Ho Chi Minh City. I don’t think that I can ever use your service again. I typed my information into the browser along with my passport number and four days before I’m leaving I have to quickly search another ticket to fly out here.

Seats are uncomfortable. This has been a trend in the industry for decades. Trying to fit more seats on each plane to increase profits at the expense of the passenger.

The flight was delayed so we were dead tired, and after that the turbulence was horrible. I was very scared.

It’s always a great time flying with united airlines.

Good flight. Efficient boarding and competent flight crew. No problems until we arrived at our destination gate. We were early so there was an aircraft at the gate that had to move before we could pull in. Then, due to the type of aircraft we flew, the cabin door could not be opened until some luggage from the cargo bay was offloaded to preserve center of gravity characteristics. So, that further delayed deplaning. Despite being 20 minutes early on landing, we ended up being 5 to 10 minutes late after all the delays.

Everything went well except the turbulence what no one have a control of but pilot and crew handled very good!

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)