What is the cheapest month to book a flight from Guam to London Heathrow Airport?

Currently, January is the cheapest month in which you can book a flight from Guam to London Heathrow Airport (average of £112). Flying from Guam to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

In terms of precipitation, rainfall in London Heathrow Airport ranges from 40.0 - 70.0 inches per month. January is typically the wettest month, when rainfall can reach 70.0 mm. July is typically the driest time to visit London Heathrow Airport when rainfall is around 40.0 mm.

If weather is an important factor for your trip to London Heathrow Airport, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 17.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 4.0 C).

What is the cheapest time of day to fly from GU to LHR?

When flying from Guam to London Heathrow Airport, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Can I find deals for flights from Guam to Heathrow that include hotel bookings?

Yes. In addition to deals on Guam to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.

How can I find direct flights from Guam to Heathrow?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Guam to Heathrow.

Can I find deals for business class flights from Guam to Heathrow?

Yes. Cheapflights offers flight deals from Guam to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

£506+ Flights from Guam to London Heathrow Airport

Cheap flight deals from Guam to Heathrow

Round-trip from	£1,029
One-way from	£506

23/8-31/8
4 total stops
80h 05m total
Guam to London

Search Deals

29/7
3 total stops
47h 00m total
Guam to London

Search Deals

Find flight deals from Guam to Heathrow

Cheapest flights from Guam to Heathrow
Explore the most affordable flight options available from Guam to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Sat 23/803:40GUM - LHR

2 stops48h 05mMultiple Airlines

Sun 31/809:30LHR - GUM

2 stops32h 00mMultiple Airlines

Deal found 10/7£1,029

Sat 27/1216:50GUM - LHR

1 stop33h 40mKorean Air

Sat 3/118:50LHR - GUM

1 stop33h 45mKorean Air

Deal found 10/7£1,534

Best flights from Guam to Heathrow
Discover carefully curated flight deals from Guam to Heathrow that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 11 July 2025.

Sat 23/803:40GUM - LHR

2 stops48h 05mMultiple Airlines

Sun 31/809:30LHR - GUM

2 stops32h 00mMultiple Airlines

Deal found 10/7£1,029

Sat 27/1216:50GUM - LHR

1 stop33h 40mKorean Air

Sat 3/118:50LHR - GUM

1 stop33h 45mKorean Air

Deal found 10/7£1,534

Last-minute flights from Guam to Heathrow
Discover last-minute flight deals from Guam to Heathrow. Data last updated 11 July 2025 and is based on user searches.

Wed 30/717:00GUM - LHR

1 stop33h 20mKorean Air

Thu 31/719:35LHR - GUM

1 stop19h 35mKorean Air

Deal found 11/7£1,865

Sat 23/803:40GUM - LHR

2 stops48h 05mMultiple Airlines

Sun 31/809:30LHR - GUM

2 stops32h 00mMultiple Airlines

Deal found 10/7£1,029

Cheapflights Fare Finder

Use the filters below to find and compare flights from Guam to London Heathrow Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Sat 23/8

03:40-18:45

2 stops48h 05m

London Heathrow

Sun 31/8

09:30-02:30

2 stops32h 00m

£1,029

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Sat 27/12

16:50-16:30

1 stop33h 40m

London Heathrow

Sat 3/1

18:50-14:35

1 stop33h 45m

£1,534

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Tue 29/7

03:40-17:40

3 stops47h 00m

£506

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Wed 30/7

01:55-17:20

1 stop24h 25m

£979

Flights are sorted by cheapest return flights first.

Deals found on 11/7

Best time to book a flight from Guam to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Guam with our price prediction graph.

Estimated return price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Guam to London Heathrow Airport

No data available for this route at this time. Please check back soon.

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Guam to London Heathrow Airport, such as Korean Air. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Korean Air

8.4

Very Good

1,105 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Korean Air

8.4

Very Good

1,105 reviews

Korean Air

8.4

Very Good

1,105 reviews

Check prices

Reviews

1 / 20

10.0

Excellent

Myung Suk,May 2025

ICN - LAX

The flight was less crowded and the economic class seat was at least 5 inches longer than other airlines.

Related info for your journey

Can I find deals for flights from Guam to Heathrow that include hotel bookings?
Yes. In addition to deals on Guam to Heathrow flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Guam to Heathrow?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Guam to Heathrow.
Can I find deals for business class flights from Guam to Heathrow?
Yes. Cheapflights offers flight deals from Guam to Heathrow by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Guam to London Heathrow Airport?
Currently, January is the cheapest month in which you can book a flight from Guam to London Heathrow Airport (average of £112). Flying from Guam to London Heathrow Airport in August is currently the most expensive (average of £164). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Cheap flights from Guam to London Heathrow Airport from £506

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 29/7. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Guam to Heathrow

Keep the following information in mind while searching for Guam to Heathrow flight deals. Data was last updated 11 July 2025.

Round-trip from

One-way from

Find flight deals from Guam to Heathrow

Cheapest flights from Guam to HeathrowExplore the most affordable flight options available from Guam to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Explore the most affordable flight options available from Guam to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.

Cheapflights Fare Finder

Use the filters below to find and compare flights from Guam to London Heathrow Airport that are best for you.

Best time to book a flight from Guam to Heathrow

Have a flexible travel schedule? Discover the best time to fly to Heathrow from Guam with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Guam to London Heathrow Airport

Reviews of airlines servicing Heathrow

Read through reviews of airlines operating flights from Guam to London Heathrow Airport, such as Korean Air. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Guam to Heathrow. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

Can I find deals for flights from Guam to Heathrow that include hotel bookings?

How can I find direct flights from Guam to Heathrow?

Can I find deals for business class flights from Guam to Heathrow?

What is the cheapest month to book a flight from Guam to London Heathrow Airport?

Travelling to a place near Guam?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Guam to Heathrow

See prices for flight routes from nearby airports that may be better suited for you.

Fly with Cheapflights

Find the best flight deals on Cheapflights, where travellers can enjoy low prices and a wide availability of flights to their desired destinations.

How does Cheapflights help users find flights from Guam to Heathrow?

Why should you use Cheapflights to find cheap flight tickets from Guam to Heathrow?

Can Cheapflights find flights from Guam to Heathrow with no change fees?

Can Cheapflights notify me if prices for flights from Guam to Heathrow become cheaper?

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Book with Flexibility

Travel Smart

Cheapest flights from Guam to Heathrow
Explore the most affordable flight options available from Guam to Heathrow. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 11 July 2025.