In terms of precipitation, rainfall in Guam ranges from 65.0 - 365.0 inches per month. August is typically the wettest month, when rainfall can reach 365.0 mm. March is typically the driest time to visit Guam when rainfall is around 65.0 mm.

If weather is an important factor for your trip to Guam, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 28.0 C. Travellers hoping to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 27.0 C).

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

When flying from London Heathrow Airport to Guam, 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 Heathrow to Guam that include hotel bookings?

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

How can I find direct flights from Heathrow to Guam?

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

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

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

£856+ Cheap Flights from London Heathrow Airport to Guam

Cheap flight deals from Heathrow to Guam

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Cheapest flights from Heathrow to Guam
Explore the most affordable flight options available from Heathrow to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 September 2026.

Wed 2/909:55 -

2 stops28h 50m

Tue 8/902:20 -

2 stops26h 00m

Deal found 30/8£856

Mon 28/919:35 -

1 stop19h 20m

Sun 11/1002:00 -

1 stop24h 20m

Deal found 3/9£1,264

Sat 5/919:35 -

1 stop19h 20m

Wed 9/917:20 -

1 stop33h 00m

Deal found 31/8£1,383

Mon 28/909:30 -

2 stops29h 25m

Mon 12/1017:20 -

2 stops34h 25m

Deal found 3/9£1,467

Find flight deals from Heathrow to Guam

Round-trip from	£1,264

Korean Air
28/9-11/10
2 total stops
43h 40m total
London to Guam

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LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Mon 28/9

09:30-23:55

2 stops29h 25m

Tamuning Guam Intl

Mon 12/10

17:20-18:45

2 stops34h 25m

£1,467

LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Mon 28/9

16:15-18:05

2 stops64h 50m

Tamuning Guam Intl

Mon 12/10

12:15-12:25

2 stops33h 10m

£12,029

Flights are sorted by cheapest return flights first.

Deals found on 3/9

Sorted by cheapest first

Best time to book a flight from Heathrow to Guam

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

LHR-GUM

Estimated return price

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Cheapflights Insights

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

LHR-GU0

LHR-GUM

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

Related info for your journey

Can I find deals for flights from Heathrow to Guam that include hotel bookings?
Yes. In addition to deals on Heathrow to Guam flights, Cheapflights offers holiday packages that include both flights and hotel.
How can I find direct flights from Heathrow to Guam?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Heathrow to Guam.
Can I find deals for business class flights from Heathrow to Guam?
Yes. Cheapflights offers flight deals from Heathrow to Guam by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

Browse thousands of different options on Cheapflights for your next trip

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Cheap flights from London Heathrow Airport to Guam from £856

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/9. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Guam

Cheapest flights from Heathrow to GuamExplore the most affordable flight options available from Heathrow to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 September 2026.

Explore the most affordable flight options available from Heathrow to Guam. Find the lowest fares from popular airlines and budget airlines, with prices last updated on 4 September 2026.

Best flights from Heathrow to GuamDiscover carefully curated flight deals from Heathrow to Guam that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 September 2026.

Discover carefully curated flight deals from Heathrow to Guam that have cost, travel time, and stopovers in mind to ensure you get the best travel experience. Data last updated 4 September 2026.

Last-minute flights from Heathrow to GuamDiscover last-minute flight deals from Heathrow to Guam. Data last updated 4 September 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Guam. Data last updated 4 September 2026 and is based on user searches.

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

Best time to book a flight from Heathrow to Guam

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Cheapflights Insights

Related info for your journey

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

How can I find direct flights from Heathrow to Guam?

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

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Complete your trip

Complete your trip to Guam by adding a car hire and/or hotel booking to your travel itinerary.

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Heathrow and Guam flights

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