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.

£816+ Cheap Flights from Guam to London Heathrow Airport

Cheap flight deals from Guam to Heathrow

Round-trip from	£816

12/10-19/10
4 total stops
60h 30m 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 29 August 2025.

Sun 12/1006:00GUM - LHR

2 stops34h 30mMultiple Airlines

Sun 19/1017:30LHR - GUM

2 stops26h 00mMultiple Airlines

Deal found 28/8£816

Sun 28/916:20GUM - LHR

2 stops37h 10mMultiple Airlines

Sun 5/1022:40LHR - GUM

2 stops31h 40mMultiple Airlines

Deal found 28/8£879

Mon 1/915:30GUM - LHR

2 stops34h 35mMultiple Airlines

Sun 7/909:30LHR - GUM

2 stops28h 40mMultiple Airlines

Deal found 27/8£1,113

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 29 August 2025.

Sun 12/1006:00GUM - LHR

2 stops34h 30mMultiple Airlines

Sun 19/1017:30LHR - GUM

2 stops26h 00mMultiple Airlines

Deal found 28/8£816

Sun 28/916:20GUM - LHR

2 stops37h 10mMultiple Airlines

Sun 5/1022:40LHR - GUM

2 stops31h 40mMultiple Airlines

Deal found 28/8£879

Thu 12/202:30GUM - LHR

1 stop24h 00mMultiple Airlines

Fri 20/218:50LHR - GUM

1 stop20h 30mMultiple Airlines

Deal found 27/8£1,397

Last-minute flights from Guam to Heathrow
Discover last-minute flight deals from Guam to Heathrow. Data last updated 29 August 2025 and is based on user searches.

Mon 1/915:30GUM - LHR

2 stops34h 35mMultiple Airlines

Sun 7/909:30LHR - GUM

2 stops28h 40mMultiple Airlines

Deal found 27/8£1,113

Sun 28/916:20GUM - LHR

2 stops37h 10mMultiple Airlines

Sun 5/1022:40LHR - GUM

2 stops31h 40mMultiple Airlines

Deal found 28/8£879

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

Sun 12/10

06:00-07:30

2 stops34h 30m

London Heathrow

Sun 19/10

17:30-04:30

2 stops26h 00m

£816

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Sun 28/9

16:20-20:30

2 stops37h 10m

London Heathrow

Sun 5/10

22:40-15:20

2 stops31h 40m

£879

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Thu 12/2

02:30-16:30

1 stop24h 00m

London Heathrow

Fri 20/2

18:50-01:20

1 stop20h 30m

£1,397

Flights are sorted by cheapest return flights first.

Deals found on 28/8

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

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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 £816

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/10. 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 29 August 2025.

Round-trip 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 29 August 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 29 August 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

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 London Heathrow Airport?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Guam to Heathrow

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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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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 29 August 2025.