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 month to fly from London Heathrow Airport to Guam?

The best pricing can be found in the month of June. Prices to Guam from London Heathrow Airport average £1,014. You can even find prices in June for less than £1,014, as users have found deals to Guam from as low as £837. The month of October appears to be one of the more expensive times to travel to Guam from London Heathrow Airport. Flying in the targeted month can save you up to 14%.

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.

£740+ Flights from London Heathrow Airport to Guam

Cheap flight deals from Heathrow to Guam

Round-trip from	£740
Popular in	October
Cheapest in	June
Average price	£1,035

28/8-3/9
4 total stops
65h 40m total
London to Guam

Search Deals

Highest demand for flights based on searches. 3% potential increase in price (£27 potential increase over avg. return price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease (£10 potential savings vs. average return price).

Search Deals

Average for round-trip flights in July 2025

Search Deals

Find flight deals from Heathrow to Guam

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 14 July 2025.

Thu 28/806:30LHR - GUM

2 stops35h 00mMultiple Airlines

Wed 3/900:20GUM - LHR

2 stops30h 40mMultiple Airlines

Deal found 14/7£740

Thu 28/819:35LHR - GUM

1 stop19h 35mKorean Air

Thu 4/917:00GUM - LHR

1 stop33h 20mKorean Air

Deal found 14/7£1,168

Best flights from Heathrow to Guam
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 14 July 2025.

Thu 28/806:30LHR - GUM

2 stops35h 00mMultiple Airlines

Wed 3/900:20GUM - LHR

2 stops30h 40mMultiple Airlines

Deal found 14/7£740

Thu 28/819:35LHR - GUM

1 stop19h 35mKorean Air

Thu 4/917:00GUM - LHR

1 stop33h 20mKorean Air

Deal found 14/7£1,168

Last-minute flights from Heathrow to Guam
Discover last-minute flight deals from Heathrow to Guam. Data last updated 14 July 2025 and is based on user searches.

Thu 28/806:30LHR - GUM

2 stops35h 00mMultiple Airlines

Wed 3/900:20GUM - LHR

2 stops30h 40mMultiple Airlines

Deal found 14/7£740

Thu 28/819:35LHR - GUM

1 stop19h 35mKorean Air

Thu 4/917:00GUM - LHR

1 stop33h 20mKorean Air

Deal found 14/7£1,168

Cheapflights Fare Finder

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

Fly from

Fly to

Route

Depart

Return

Price

LondonTamuning

LHR - GUM

LHRGUM

London Heathrow

Thu 28/8

06:30-02:30

2 stops35h 00m

Tamuning Guam Intl

Wed 3/9

00:20-22:00

2 stops30h 40m

£740

LondonTamuning

LHR - GUM

LHRGUM

London Heathrow

Thu 28/8

19:35-00:10

1 stop19h 35m

Tamuning Guam Intl

Thu 4/9

17:00-17:20

1 stop33h 20m

£1,168

Flights are sorted by cheapest return flights first.

Deals found on 14/7

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.

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 London Heathrow Airport to Guam

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.

Reviews of airlines servicing Guam

Check out reviews from past customers who have flown with Korean Air from London Heathrow Airport to Guam to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Korean Air

8.4

Very Good

1,109 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

1,109 reviews

Korean Air

8.4

Very Good

1,109 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 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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Top 2 airlines flying from Heathrow to Guam

Airline	Cheapest	Average	Flexibility	On-time
Japan Airlines	Cheapest£816	Average£906	FlexibilityNo cancel fee	On-time79%	Search Japan Airlines flights
Korean Air	Cheapest£1,024	Average£1,104	FlexibilityNo cancel fee	On-time81%	Search Korean Air flights

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

Cheapflights makes it easy to find Heathrow to Guam flights by helping our users search from 900+ travel sites for deals. We also provide you with filters for cabin, price, airline, airports, number of stops, and many more to narrow down that perfect flight.

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Millions of users choose and trust Cheapflights to book the best flight deals from Heathrow to Guam for free. We help you search and compare prices from hundreds of airlines for the right flight just for you.

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Users can book flights with no change fees policies with our dedicated filters. Book flights from Heathrow to Guam flexibly with Cheapflights today.

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

Yes! Start tracking prices for Heathrow to Guam flights today and get alerted whenever prices for these flights change. To access this feature, click the bell icon next to the flight deals above, which will prompt you for a valid email address to receive your alerts.

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Cheap flights from London Heathrow Airport to Guam from £740

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 28/8. Fares are subject to change and may not be available on all flights or dates of travel.

Cheap flight deals from Heathrow to Guam

Keep the following information in mind while searching for Heathrow to Guam flight deals. Data was last updated 14 July 2025.

Round-trip from

Popular in

Cheapest in

Average price

Find 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 14 July 2025.

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 14 July 2025.

Cheapflights Fare Finder

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

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

Cheapflights Insights

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

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

Find hourly flight availability from Heathrow to Guam. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated 14 July 2025.

Reviews of airlines servicing Guam

Get insights into the airlines that provide service to Guam. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Guam. Reviews last updated 14 July 2025.

Check out reviews from past customers who have flown with Korean Air from London Heathrow Airport to Guam to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Heathrow to Guam. 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 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

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

Top 2 airlines flying from Heathrow to Guam

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 Heathrow to Guam?

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

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

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

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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 14 July 2025.