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.

£855+ Cheap Flights from London Heathrow Airport to Guam

Cheap flight deals from Heathrow to Guam

Enter your travel dates to find the best prices.

Cheapest

Best

Last-minute

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 31 August 2026.

Wed 2/909:55 -

2 stops28h 50m

Tue 8/902:20 -

2 stops26h 00m

Deal found 30/8£855

Mon 12/1016:35 -

1 stop23h 25m

Sun 18/1000:50 -

2 stops26h 15m

Deal found 28/8£897

Tue 22/909:55 -

3 stops28h 50m

Mon 28/900:50 -

2 stops26h 15m

Deal found 27/8£967

Tue 15/916:35 -

1 stop26h 00m

Tue 22/904:40 -

2 stops35h 50m

Deal found 29/8£1,019

Sat 12/916:35 -

1 stop23h 25m

Sat 19/904:40 -

2 stops35h 50m

Deal found 29/8£1,046

Thu 24/915:05 -

2 stops28h 15m

Sun 27/906:00 -

2 stops33h 25m

Deal found 29/8£1,128

Find flight deals from Heathrow to Guam

Round-trip from	£897

12/10-18/10
3 total stops
49h 40m total
London to Guam

Search Deals

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

Cheapest return flight

LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Tue 15/9

13:25-01:15

1 stop26h 50m

Tamuning Guam Intl

Tue 22/9

04:40-18:50

1 stop23h 10m

£937

Fastest return journey

LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Mon 12/10

19:35-03:35

1 stop23h 00m

Tamuning Guam Intl

Mon 19/10

04:40-17:20

1 stop21h 40m

£963

LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Tue 22/9

15:05-04:20

2 stops28h 15m

Tamuning Guam Intl

Mon 28/9

00:50-18:05

2 stops26h 15m

£1,096

LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Sat 12/9

08:55-01:15

3 stops31h 20m

Tamuning Guam Intl

Sat 19/9

17:20-19:10

3 stops34h 50m

£1,170

LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Sat 12/9

15:05-04:20

2 stops28h 15m

Tamuning Guam Intl

Sat 19/9

06:00-06:25

2 stops33h 25m

£1,230

LondonTamuning

LHR London Heathrow - GUM Tamuning Guam Intl

LHRGUM

London Heathrow

Tue 22/9

19:35-23:55

1 stop19h 20m

Tamuning Guam Intl

Tue 29/9

17:20-17:20

1 stop33h 00m

£1,316

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

£1,447

Flights are sorted by cheapest return flights first.

Deals found on 29/8

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

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

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

Alternative routes

Complete your trip

Direct flights to

Flights by cabin class

Other flight options

Popular flights

Top destinations

Alternative routes for Heathrow to Guam

Heathrow to Sydney flights

Gatwick to Sydney flights

Stansted to Sydney flights

Heathrow to Perth flights

London City to Sydney flights

Heathrow to Melbourne flights

Gatwick to Melbourne flights

Heathrow to Auckland flights

Stansted to Melbourne flights

Gatwick to Auckland flights

London City to Melbourne flights

Heathrow to Brisbane flights

Gatwick to Perth flights

Stansted to Auckland flights

Stansted to Perth flights

London City to Perth flights

London City to Auckland flights

Gatwick to Brisbane flights

Luton to Sydney flights

Stansted to Brisbane flights

London City to Brisbane flights

Heathrow to Avalon flights

Heathrow to Adelaide flights

Heathrow to Christchurch flights

Luton to Auckland flights

Gatwick to Adelaide flights

Southend to Sydney flights

Gatwick to Christchurch flights

Heathrow to Nadi flights

Stansted to Adelaide flights

Stansted to Christchurch flights

London City to Adelaide flights

Luton to Brisbane flights

Luton to Perth flights

Gatwick to Avalon flights

Heathrow to Wellington flights

Gatwick to Nadi flights

Gatwick to Wellington flights

Stansted to Wellington flights

Heathrow to Queenstown flights

Gatwick to Queenstown flights

Stansted to Queenstown flights

Stansted to Nadi flights

London City to Christchurch flights

Heathrow to Cairns flights

Heathrow to Coolangatta flights

Gatwick to Cairns flights

Stansted to Cairns flights

Gatwick to Coolangatta flights

Stansted to Coolangatta flights

Fly with Cheapflights

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.

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

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.

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

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.

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.

Cheap flights from London Heathrow Airport to Guam from £855

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 31 August 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 31 August 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 31 August 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 31 August 2026.

Last-minute flights from Heathrow to GuamDiscover last-minute flight deals from Heathrow to Guam. Data last updated 31 August 2026 and is based on user searches.

Discover last-minute flight deals from Heathrow to Guam. Data last updated 31 August 2026 and is based on user searches.

Find flight deals from Heathrow to Guam

Round-trip from

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

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

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

Complete your trip

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

Direct flights to

Book a non-stop flight to one of these other cities located in .

Search flights from Heathrow to Guam by cabin class

Find flights from Heathrow to Guam, based on your preferred cabin class, be it economy, premium economy, business, or first class.

Heathrow and Guam flights

Browse other Heathrow and Guam flight options. Last updated on 31 August 2026.

Popular flight searches

Check out other popular destinations found by fellow travellers in 2026

Heathrow to Guam flights

Consider these flights travelling from Heathrow to Guam.

Fly with Cheapflights

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?

100% Free

Book with Flexibility

Travel Smart

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 31 August 2026.

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 31 August 2026.

Last-minute flights from Heathrow to Guam
Discover last-minute flight deals from Heathrow to Guam. Data last updated 31 August 2026 and is based on user searches.