Cheap flights from London Heathrow Airport to Guam from £6,037

This is the cheapest retur flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 14/9. Fares are subject to change and may not be available on all flights or dates of travel.
LHR — GUM
4 Sep — 11 Sep1
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 30 August 2025.

Round-trip from

£6,037

Popular in

October

Cheapest in

June

Average price

£1,017
Japan Airlines
  • Japan Airlines
  • 14/9-3/10
  • 4 total stops
  • 83h 10m total
  • London to Guam
Highest demand for flights based on searches. 3% potential increase in price (£28 potential increase over avg. return price).
Cheapest flight prices on average. 1% potential price decrease (£10 potential savings vs. average return price).
Average for round-trip flights in August 2025

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 30 August 2025.

Sun 14/920:00LHR - GUM
2 stops57h 40mJapan Airlines
Fri 3/1016:40GUM - LHR
2 stops25h 30mJapan Airlines
Deal found 29/8£6,037
Sun 14/918:30LHR - GUM
2 stops25h 00mMultiple Airlines
Thu 2/1003:05GUM - LHR
2 stops48h 40mMultiple Airlines
Deal found 29/8£7,543

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 30 August 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

Sun 14/9

20:00-14:40

2 stops57h 40m

Tamuning Guam Intl

Fri 3/10

16:40-09:10

2 stops25h 30m

£6,037

LondonTamuning

LHR - GUM

LHRGUM

London Heathrow

Sun 14/9

18:30-04:30

2 stops25h 00m

Tamuning Guam Intl

Thu 2/10

03:05-18:45

2 stops48h 40m

£7,543

Flights are sorted by cheapest return flights first.

Deals found on 29/8

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 30 August 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.

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 30 August 2025.
Check out reviews from past customers who have flown with Korean Air and Japan Airlines 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.

Comfort

8.2

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Comfort

8.2

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

Comfort

8.2

Entertainment

8.2

Food

8.1

Overall

8.4

Boarding

8.5

Crew

8.7

Reviews

1 / 20
10.0
Excellent

Jacqueline,Aug 2025

ICN - SEA

Well, I was upset at first because I have a special diet and I need to order vegetarian and I couldn’t do it before the trip, but the stewardess were so nice and they gave me sandwiches that were plant-based which I loved!!

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

    Departing from London Heathrow Airport to Guam will take you 57h 40m. The distance between London Heathrow Airport and Guam is about 7483 mi.

  • 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.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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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 30 August 2025.
AirlineCheapestAverageFlexibilityOn-time
Japan AirlinesCheapest£816Average£905FlexibilityNo cancel feeOn-time79%
Search Japan Airlines flights
Korean AirCheapest£1,024Average£1,104FlexibilityNo cancel feeOn-time81%
Search Korean Air flights

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