GTF - LHR

$874 Find Cheap Flights from Great Falls to London - Compare and Save

1 adult
1 adult, Economy, 0 bags

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Everything you should know

Cheapest round-trip
$874
Typical prices: $1,113-$1,760
United Airlines
Wed 2/28Sun 3/4
GTF - LHR • 2 stops
Nonstop flights
Not available
There are currently no direct flights between Great Falls and London Heathrow Airport. You'll need to take a connecting flight to reach the destination.
Insights
Insights
When to travel
February
Cheapest • 37% price drop
May
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Seattle/Tacoma Intl (SEA)
Cheapest • Avg $1,072 (round-trip)
Denver Intl (DEN)
Shortest trip • 13h 36m (one-way)
Insights
Insights
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We hope you love your trip to London Heathrow Airport!
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Booking Insights
Flight Deals

Cheap Flights from Great Falls to Heathrow (GTF-LHR)

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

Recent round-trip flight deals from Great Falls to Heathrow

Sun, Feb 28 - Thu, Mar 4
United Airlines Logo
2:42 pm - 8:45 amGTF  Great Falls-LHR London Heathrow
59h 03m2 stops Denver Intl Frankfurt am Main
United Airlines Logo
6:35 am - 9:34 pmLHR  London Heathrow-GTF Great Falls
21h 59m2 stops Munich Franz Josef Strauss Denver Intl
$874United Airlines
Sun, Feb 28 - Thu, Mar 4
United Airlines Logo
6:30 am - 9:40 amGTF  Great Falls-LHR London Heathrow
20h 10m1 stop Denver Intl
United Airlines Logo
6:35 am - 9:34 pmLHR  London Heathrow-GTF Great Falls
21h 59m2 stops Munich Franz Josef Strauss Denver Intl
$901United Airlines
Sat, Apr 24 - Wed, Apr 28
United Airlines Logo
2:25 pm - 10:00 amGTF  Great Falls-LHR London Heathrow
36h 35m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
6:55 am - 1:29 pmLHR  London Heathrow-GTF Great Falls
37h 34m2 stops Munich Franz Josef Strauss Denver Intl
$908United Airlines
Sat, Apr 24 - Wed, Apr 28
United Airlines Logo
2:25 pm - 10:00 amGTF  Great Falls-LHR London Heathrow
36h 35m2 stops Denver Intl Montreal Pierre Elliott Trudeau Intl
United Airlines Logo
6:55 am - 1:29 pmLHR  London Heathrow-GTF Great Falls
37h 34m2 stops Munich Franz Josef Strauss Denver Intl
$909United Airlines
Sun, Feb 28 - Thu, Mar 4
United Airlines Logo
2:42 pm - 9:40 amGTF  Great Falls-LHR London Heathrow
11h 58m1 stop Denver Intl
United Airlines Logo
11:35 am - 9:34 pmLHR  London Heathrow-GTF Great Falls
16h 59m1 stop Denver Intl
$935United Airlines
Sat, Apr 24 - Wed, Apr 28
Alaska Airlines Logo
4:55 pm - 3:05 pmGTF  Great Falls-LHR London Heathrow
15h 10m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:00 pm - 4:13 pmLHR  London Heathrow-GTF Great Falls
30h 13m1 stop Seattle/Tacoma Intl
$950Alaska Airlines
Sat, Apr 24 - Wed, Apr 28
Alaska Airlines Logo
4:55 pm - 3:05 pmGTF  Great Falls-LHR London Heathrow
15h 10m1 stop Seattle/Tacoma Intl
Alaska Airlines Logo
5:00 pm - 4:13 pmLHR  London Heathrow-GTF Great Falls
30h 13m1 stop Seattle/Tacoma Intl
$951Alaska Airlines
Wed, Apr 7 - Sat, Apr 17
United Airlines Logo
6:15 am - 9:40 amGTF  Great Falls-LHR London Heathrow
20h 25m1 stop Denver Intl
United Airlines Logo
7:25 am - 10:30 pmLHR  London Heathrow-GTF Great Falls
22h 05m2 stops Munich Franz Josef Strauss Denver Intl
$955United Airlines
Sat, Apr 24 - Wed, Apr 28
United Airlines Logo
2:25 pm - 12:25 pmGTF  Great Falls-LHR London Heathrow
15h 00m1 stop Denver Intl
United Airlines Logo
9:00 am - 10:30 pmLHR  London Heathrow-GTF Great Falls
20h 30m2 stops Munich Franz Josef Strauss Denver Intl
$956United Airlines
Wed, Apr 7 - Sat, Apr 17
United Airlines Logo
6:15 am - 6:45 amGTF  Great Falls-LHR London Heathrow
17h 30m2 stops Denver Intl Chicago O'Hare Intl
United Airlines Logo
9:00 am - 10:30 pmLHR  London Heathrow-GTF Great Falls
20h 30m2 stops Munich Franz Josef Strauss Denver Intl
$959United Airlines
Booking Insights

Price, demand and travel trends for Great Falls to London Heathrow Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights with more confidence.

How much is a round-trip flight from Great Falls to London Heathrow Airport?

Round-trip flights from Great Falls to London Heathrow Airport typically range from $1,113 to $1,760. The lowest price found in the past 5 days was $874, on United Airlines.

What's the cheapest day of the week to fly from Great Falls to London Heathrow Airport?

Based on deals KAYAK users found in the last 12 months, Monday is the cheapest day of the week to fly from Great Falls to London Heathrow Airport. It’s 29% cheaper than the average day, while Sunday is the most expensive, with prices 50% higher.

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Key details for Great Falls to London Heathrow Airport flights

Low season

January

Cheapest flight

$874
Beat the crowds with an average 80% drop in travelers.
The most popular month to fly with an average 122% increase in travelers.
Round-trip flight from Great Falls to London Heathrow Airport

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

Your Great Falls to London Heathrow Airport flight questions, answered

Find helpful answers about this route, including flight times, airports, airlines and booking tips.

  • What cabin classes can I book on flights from Great Falls to London Heathrow Airport?

    Only Economy Class is available on flights from Great Falls to London Heathrow Airport.

  • How long is a flight from Great Falls to London Heathrow Airport?

    A nonstop flight from Great Falls to London Heathrow Airport takes 00m, covering 4,472 miles.

  • Do I need a passport to fly from Great Falls to London Heathrow Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • How much should I expect to pay for a Great Falls to London Heathrow Airport flight?

    Round-trip flights from Great Falls to London Heathrow Airport range from $1,113 to $1,760, with an average of $1,378 over the past 12 months. Anything below $1,113 counts as a good deal.

  • Have flight prices from Great Falls to London Heathrow Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $874 to $2,981. That means the highest observed fare was about 3x higher than the lowest one.

  • What car rental options are available at London Heathrow Airport (LHR)?

    London Heathrow Airport (LHR) hosts 5 major car rental companies, with daily rates averaging $39 for economy cars. Top options include:

    • GREEN MOTION
    • DRIVALIA
    • Europcar
    • Alamo
    • Rentacar

  • Which airports can I use when flying from Great Falls to London Heathrow Airport?

    Flights from Great Falls to London Heathrow Airport usually depart from Great Falls (GTF) and arrive at London Heathrow (LHR).

  • Which airports do connecting flights from Great Falls to London Heathrow Airport pass through?

    One-stop flights from Great Falls to London Heathrow Airport most commonly connect through:

    • Denver Intl (DEN) - 53% of one-stop connections
    • Seattle/Tacoma Intl (SEA) - 25% of one-stop connections
    • Salt Lake City (SLC) - 22% of one-stop connections

  • Can I save money by using flexible dates for flights from Great Falls to London Heathrow Airport?

    Yes. Flexible dates can save you up to 53% on flights from Great Falls to London Heathrow Airport. Monday is the cheapest departure day at $979 round-trip on average, while Sunday is the most expensive at $2,078, a difference of $1,099.

    KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • How much time can I save by choosing a different layover airport from Great Falls to London Heathrow Airport?

    Flying via Seattle/Tacoma Intl (SEA) gives the shortest average 1-stop total travel time at 13h 34m, compared with 13h 36m via Denver Intl (DEN) and 14h 09m via Salt Lake City (SLC).

  • What is the time difference between Great Falls and London Heathrow Airport?

    London Heathrow Airport is 7 hours ahead of Great Falls (British Time vs Mountain Time). Plan for the time shift when scheduling connections or first-day activities.

  • What popular places can I visit in London Heathrow Airport?

    Some of the most popular sights in London Heathrow Airport are Hyde Park and Buckingham Palace. These are among the most viewed places in London Heathrow Airport on KAYAK.

Your guide to booking Great Falls to London Heathrow Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates are flexible, aim for a Monday departure and avoid flying on Sunday. On this route, Monday flights average $979, about $1,099 less than Sunday fares (53% savings) based on the last 12 months.
  • If you can choose when to travel, plan your Great Falls to London Heathrow Airport trip for February. Fares historically average $863 round-trip in that month - typically $1,215 less than the most expensive month, which is November (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to London Heathrow Airport.

    • Hilton London Heathrow Airport

More options for your flight from Great Falls to Heathrow

Complete your trip to London with a hotel stay or car rental

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