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Cheap flights from London Heathrow Airport to Guam from £844

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — GUM
31 Mar — 7 Apr1
1 adult

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 26 March 2025.

Round-trip from

£844

Popular in

October

Cheapest in

June

Average price

£1,029
3/5-10/5
  • 3/5-10/5
  • 4 total stops
  • 92h 50m total
  • London to Guam
Search Deals
Highest demand for flights based on searches. 2% potential increase in price (£20 potential increase over avg. return price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease (£13 potential savings vs. average return price).
Search Deals
Average for round-trip flights in March 2025
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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 26 March 2025.

Sat 3/521:00LHR - GUM
2 stops32h 45mMultiple Airlines
Sat 10/515:55GUM - LHR
2 stops60h 05mMultiple Airlines
Deal found 26/3£844
Fri 2/519:20LHR - GUM
1 stop34h 20mJapan Airlines
Fri 9/516:40GUM - LHR
1 stop32h 10mJapan Airlines
Deal found 26/3£990
Fri 2/511:25LHR - GUM
2 stops45h 50mUnited Airlines
Sat 10/512:00GUM - LHR
2 stops30h 20mUnited Airlines
Deal found 26/3£1,919

Cheapflights Fare Finder

Customise your flight search to find flights from Heathrow to Guam that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 26 March 2025.
Use the filters below to find and compare flights from London Heathrow Airport to Guam that are best for you.

Fly from

Heathrow

Fly to

Guam

Route

Depart

Return

Price

LondonTamuning

LHR - GUM

LHRGUM

London Heathrow

Sat 3/5

21:00-14:45

2 stops32h 45m

Tamuning Guam Intl

Sat 10/5

15:55-19:00

2 stops60h 05m

£844

LondonTamuning

LHR - GUM

LHRGUM

London Heathrow

Fri 2/5

19:20-14:40

1 stop34h 20m

Tamuning Guam Intl

Fri 9/5

16:40-15:50

1 stop32h 10m

£990

LondonTamuning

LHR - GUM

LHRGUM

London Heathrow

Fri 2/5

11:25-18:15

2 stops45h 50m

Tamuning Guam Intl

Fri 9/5

12:30-09:20

2 stops29h 50m

£1,919

Flights are sorted by cheapest return flights first.

Deals found on 26/3

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?

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 26 March 2025.

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.

Rainfall in Guam by month

Plan your trip to Guam by taking into account the average rainfall totals by month.

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.

Temperature in Guam by month

Plan your trip to Guam by taking into account the average temperature totals by month.

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).

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 26 March 2025.
Japan Airlines
8.3
Very Good
1,440 reviews
Check prices

Entertainment

7.8

Crew

8.7

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!
Japan Airlines
8.3
Very Good
1,440 reviews
Japan Airlines
8.3
Very Good
1,440 reviews
Check prices

Entertainment

7.8

Crew

8.7

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!
United Airlines
7.4
Good
8,608 reviews
Japan Airlines
8.3
Very Good
1,440 reviews
Check prices

Entertainment

7.8

Crew

8.7

Overall

8.3

Food

7.7

Boarding

8.4

Comfort

8.2

Reviews

1 / 20
8.0
Excellent

Diego,Nov 2024

HKG - NRT

overall very good; just found a bit poor the food options in Narita airport but the in the flight it was good but limited (no real choice to avoid seafood or clearly stay away from pork..); most of the food was tasty tho and the choice was nice, specially their snacks and dessert and drinks. The in-flight systems was so-so (too complicated interface; they should rehaul with a proper UIX), and I specially appreciated their segments of videos capsules about the behind the scenes including an overview of technicalities of their aircraft and days in the life of their pilots. It was refreshing and give a good ideas of the efforts and challenges every employees has to deal with. Loved it!

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?

    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.

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Top 2 airlines flying from Heathrow to Guam

Discover the top 2 airlines that operate flights from Heathrow to Guam. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 858,174 searches. Data last updated 26 March 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest£852Average£907FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Korean AirCheapest£1,068Average£1,148FlexibilityNo cancel feeOn-time81%
Search Korean Air flights

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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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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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