How long is the flight from Guam to London Heathrow Airport?

A quick flight from Guam to London Heathrow Airport can take about 25h 30m. Korean Air provides one of the quickest options available for as low as £1,478. Airlines will cover a distance of 7483 mi.

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.

£726+ Flights from Guam to London Heathrow Airport

Cheap flight deals from Guam to Heathrow

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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 12 December 2025.

Wed 21/102:40GUM - LHR

2 stops24h 50mMultiple Airlines

Mon 26/117:40LHR - GUM

2 stops21h 30mMultiple Airlines

Deal found 11/12£726

Thu 12/301:00GUM - LHR

1 stop25h 30mKorean Air

Mon 16/318:50LHR - GUM

1 stop18h 15mKorean Air

Deal found 9/12£1,478

Find flight deals from Guam to Heathrow

Round-trip from	£726

21/1-26/1
4 total stops
46h 20m total
Guam to London

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

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Fly to

Route

Depart

Return

Price

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Wed 21/1

02:40-17:30

2 stops24h 50m

London Heathrow

Mon 26/1

17:40-01:10

2 stops21h 30m

£726

TamuningLondon

GUM - LHR

GUMLHR

Tamuning Guam Intl

Thu 12/3

01:00-16:30

1 stop25h 30m

London Heathrow

Mon 16/3

18:50-23:05

1 stop18h 15m

£1,478

Flights are sorted by cheapest return flights first.

Deals found on 11/12

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.

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

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Related info for your journey

How long is the flight from Guam to London Heathrow Airport?
A quick flight from Guam to London Heathrow Airport can take about 25h 30m. Korean Air provides one of the quickest options available for as low as £1,478. Airlines will cover a distance of 7483 mi.
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.

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Cheap flights from Guam to London Heathrow Airport from £726

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 21/1. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Guam to Heathrow

Best flights from Guam to HeathrowDiscover 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 12 December 2025.

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 12 December 2025.