How long is the flight from London to Alaska?

Departing from London to Alaska will take you 18h 53m. Airlines will cover a distance of 4495 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

In terms of precipitation, rainfall in Alaska ranges from 0.5 - 3.3 inches per month. August is typically the wettest month, when rainfall can reach 3.3 in. April is typically the driest time to visit Alaska when rainfall is around 0.5 in.

If weather is an important factor for your trip to Alaska, 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 59.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 17.6 F).

What are the most popular routes from London to Alaska?

Most travelers choose London Heathrow - Anchorage, London Gatwick - Anchorage or London City - Anchorage when deciding on the best route from London to Alaska.

How far in advance should I book a flight from London to Alaska?

Travelers have found it’s best to book a flight 45 days in advance to save up to 42% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 45 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from London to Alaska 1-2 weeks in advance for as low as $1,223, or $1,873 for flights within the next 24 hours.

What is the cheapest month to fly from London to Alaska?

April is one of the best times of the year to fly to Alaska from London. Prices for April average $1,374 per person but you can even find prices for as low as $840. The most expensive prices can be found in the month of January. Opting for a April flight can save you 18% on your journey compared to booking in January

Can I find deals for flights from London to Alaska that include hotel bookings?

Yes. In addition to deals on London to Alaska flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from London to Alaska?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Alaska.

Can I find deals for business class flights from London to Alaska?

Yes. Cheapflights offers flight deals from London to Alaska by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

$607+ Flights from London to Alaska

Q: How much does it cost to fly round-trip from London to Alaska?

Airfare is below average for this route at the moment. London to Alaska flights typically cost between $964 and $1,600 in October. The cheapest round-trip price found within the last 3 days was $898 on Icelandair (Oct 29-Nov 5).

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Cheap flight deals from London to Alaska

Round-trip from	$898 (oojo)
One-way from	$607 (Kiwi.com)
Popular in	January
Cheapest in	April
Average price	$1,053

From London (LON) to Alaska

Search Deals

One-way flight from London (LON) to Alaska

Search Deals

Highest demand for flights based on searches. 5% potential increase in price ($83 potential increase over avg. RT price).

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Cheapest flight prices on average. 1% potential price decrease ($24 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Find flight deals from London to Alaska

Cheapest flights from London to Alaska
Explore the most affordable flight options available from London to Alaska. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Wed 10/2911:55 amLGW - ANC

2 stops18h 53mIcelandair

Wed 11/57:05 amANC - LGW

2 stops18h 50mIcelandair

Deal found 9/13

$898

Mon 10/133:40 pmLGW - ANC

2 stops40h 05mIcelandair

Mon 10/2010:00 amANC - LGW

2 stops19h 35mIcelandair

Deal found 9/13

$901

Wed 10/298:35 pmLHR - ANC

2 stops34h 13mIcelandair

Wed 11/58:00 amANC - LHR

2 stops17h 50mIcelandair

Deal found 9/14

$905

Mon 10/133:40 pmLGW - ANC

2 stops37h 56mMultiple Airlines

Mon 10/204:34 pmANC - LGW

2 stops37h 06mMultiple Airlines

Deal found 9/13

$921

Mon 11/311:55 amLGW - ANC

2 stops18h 53mMultiple Airlines

Mon 11/178:00 amANC - LGW

2 stops17h 55mMultiple Airlines

Deal found 9/12

$923

Wed 10/2912:15 pmLHR - ANC

2 stops20h 42mMultiple Airlines

Wed 11/55:05 amANC - LHR

2 stops20h 45mMultiple Airlines

Deal found 9/13

$924

Fri 10/1710:55 amLGW - ANC

1 stop22h 27mMultiple Airlines

Thu 10/232:26 amANC - LGW

2 stops23h 29mMultiple Airlines

Deal found 9/13

$933

Tue 10/149:25 pmLHR - ANC

2 stops34h 20mIcelandair

Sun 10/198:00 amANC - LHR

2 stops18h 55mIcelandair

Deal found 9/14

$934

Tue 10/143:40 pmLGW - ANC

2 stops40h 05mMultiple Airlines

Sun 10/198:00 amANC - LGW

2 stops21h 40mMultiple Airlines

Deal found 9/14

$935

Sun 10/129:25 pmLHR - ANC

2 stops58h 20mIcelandair

Sun 10/198:00 amANC - LHR

2 stops18h 55mIcelandair

Deal found 9/13

$944

Wed 10/2912:20 pmLHR - FAI

1 stop17h 38mMultiple Airlines

Wed 11/55:55 amFAI - LHR

2 stops28h 45mMultiple Airlines

Deal found 9/14

$951

Wed 10/2911:55 amLGW - FAI

2 stops22h 46mIcelandair

Wed 11/55:55 amFAI - LGW

2 stops20h 00mIcelandair

Deal found 9/14

$958

Best flights from London to Alaska
Discover carefully curated flight deals from London to Alaska that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated September 15, 2025.

Wed 10/2911:55 amLGW - ANC

2 stops18h 53mIcelandair

Wed 11/57:05 amANC - LGW

2 stops18h 50mIcelandair

Deal found 9/13

$898

Mon 11/311:55 amLGW - ANC

2 stops18h 53mMultiple Airlines

Mon 11/178:00 amANC - LGW

2 stops17h 55mMultiple Airlines

Deal found 9/12

$923

Sun 10/126:40 amLHR - ANC

3 stops28h 19mScandinavian Airlines

Sun 10/196:00 amANC - LHR

3 stops27h 30mScandinavian Airlines

Deal found 9/13

$1,011

Wed 11/127:45 amLCY - ANC

2 stops26h 11mDelta

Sun 11/165:37 pmANC - LCY

2 stops54h 53mDelta

Deal found 9/12

$1,550

Wed 10/298:35 pmLHR - ANC

2 stops34h 13mIcelandair

Wed 11/58:00 amANC - LHR

2 stops17h 50mIcelandair

Deal found 9/14

$905

Fri 10/1710:55 amLGW - ANC

1 stop22h 27mMultiple Airlines

Thu 10/232:26 amANC - LGW

2 stops23h 29mMultiple Airlines

Deal found 9/13

$933

Tue 10/145:00 pmLHR - ANC

2 stops38h 43mScandinavian Airlines

Sun 10/196:00 amANC - LHR

2 stops30h 40mScandinavian Airlines

Deal found 9/13

$1,017

Tue 10/149:25 pmLHR - ANC

2 stops34h 20mIcelandair

Sun 10/198:00 amANC - LHR

2 stops18h 55mIcelandair

Deal found 9/14

$934

Tue 10/143:40 pmLGW - ANC

2 stops40h 05mMultiple Airlines

Sun 10/198:00 amANC - LGW

2 stops21h 40mMultiple Airlines

Deal found 9/14

$935

Sat 10/115:00 pmLHR - ANC

2 stops38h 43mScandinavian Airlines

Sun 10/196:00 amANC - LHR

2 stops30h 40mScandinavian Airlines

Deal found 9/13

$1,017

Wed 10/2912:20 pmLHR - FAI

1 stop17h 38mMultiple Airlines

Wed 11/55:55 amFAI - LHR

2 stops28h 45mMultiple Airlines

Deal found 9/14

$951

Wed 10/2911:55 amLGW - FAI

2 stops22h 46mIcelandair

Wed 11/55:55 amFAI - LGW

2 stops20h 00mIcelandair

Deal found 9/14

$958

Last-minute flights from London to Alaska
Discover last-minute flight deals from London to Alaska. Data last updated September 15, 2025 and is based on user searches.

Sun 10/129:25 pmLHR - ANC

2 stops58h 20mIcelandair

Sun 10/198:00 amANC - LHR

2 stops18h 55mIcelandair

Deal found 9/13

$944

Mon 10/133:40 pmLGW - ANC

2 stops40h 05mIcelandair

Mon 10/2010:00 amANC - LGW

2 stops19h 35mIcelandair

Deal found 9/13

$901

Mon 10/133:40 pmLGW - ANC

2 stops37h 56mMultiple Airlines

Mon 10/204:34 pmANC - LGW

2 stops37h 06mMultiple Airlines

Deal found 9/13

$921

Tue 10/149:25 pmLHR - ANC

2 stops34h 20mIcelandair

Sun 10/198:00 amANC - LHR

2 stops18h 55mIcelandair

Deal found 9/14

$934

Tue 10/143:40 pmLGW - ANC

2 stops40h 05mMultiple Airlines

Sun 10/198:00 amANC - LGW

2 stops21h 40mMultiple Airlines

Deal found 9/14

$935

Fri 10/1710:55 amLGW - ANC

1 stop22h 27mMultiple Airlines

Thu 10/232:26 amANC - LGW

2 stops23h 29mMultiple Airlines

Deal found 9/13

$933

Tue 10/2811:55 amLGW - FAI

2 stops22h 46mMultiple Airlines

Tue 11/45:55 amFAI - LGW

2 stops20h 00mMultiple Airlines

Deal found 9/13

$1,003

Wed 10/2911:55 amLGW - ANC

2 stops18h 53mIcelandair

Wed 11/57:05 amANC - LGW

2 stops18h 50mIcelandair

Deal found 9/13

$898

Wed 10/298:35 pmLHR - ANC

2 stops34h 13mIcelandair

Wed 11/58:00 amANC - LHR

2 stops17h 50mIcelandair

Deal found 9/14

$905

Wed 10/2912:15 pmLHR - ANC

2 stops20h 42mMultiple Airlines

Wed 11/55:05 amANC - LHR

2 stops20h 45mMultiple Airlines

Deal found 9/13

$924

Wed 10/2912:20 pmLHR - FAI

1 stop17h 38mMultiple Airlines

Wed 11/55:55 amFAI - LHR

2 stops28h 45mMultiple Airlines

Deal found 9/14

$951

Wed 10/2911:55 amLGW - FAI

2 stops22h 46mIcelandair

Wed 11/55:55 amFAI - LGW

2 stops20h 00mIcelandair

Deal found 9/14

$958

One-way flights from London to Alaska
Search for one-way flight options from London to Alaska. Find affordable one-way fares based on user searches. Data last updated September 15, 2025.

Tue 9/238:55 pmLGW - ANC

3 stops44h 50mMultiple Airlines

Deal found 9/13

$607

Mon 9/222:00 pmLGW - ANC

3 stops51h 45mMultiple Airlines

Deal found 9/13

$745

Tue 9/232:10 pmLHR - ANC

2 stops29h 50mMultiple Airlines

Deal found 9/13

$812

Tue 9/239:15 amLHR - ANC

1 stop20h 33mBritish Airways

Deal found 9/14

$969

Mon 9/229:25 pmLHR - ANC

2 stops37h 18mMultiple Airlines

Deal found 9/13

$1,005

Thu 10/93:40 pmLGW - ANC

2 stops19h 19mIcelandair

Deal found 9/13

$1,008

Thu 10/91:05 pmLHR - ANC

2 stops21h 54mIcelandair

Deal found 9/13

$1,012

Thu 10/911:05 amLHR - ANC

1 stop17h 52mLufthansa

Deal found 9/14

$1,094

Tue 9/236:45 amLCY - ANC

3 stops25h 02mMultiple Airlines

Deal found 9/13

$1,100

Tue 9/2311:05 amLHR - ANC

1 stop17h 42mLufthansa

Deal found 9/13

$1,207

Thu 10/98:45 amLCY - ANC

2 stops22h 57mLufthansa

Deal found 9/13

$1,301

Mon 9/229:20 amLCY - ANC

2 stops19h 59mDelta

Deal found 9/13

$1,351

Fly from

Fly to

Route

Depart

Return

Price

LondonAnchorage

LGW - ANC

LGWANC

London Gatwick

Wed 10/29

11:55 am-10:48 pm

2 stops18h 53m

Anchorage

Wed 11/5

7:05 am-10:55 am

2 stops18h 50m

$898

LondonAnchorage

LHR - ANC

LHRANC

London Heathrow

Wed 10/29

8:35 pm-10:48 pm

2 stops34h 13m

Anchorage

Wed 11/5

8:00 am-10:50 am

2 stops17h 50m

$905

LondonAnchorage

LGW - ANC

LGWANC

London Gatwick

Mon 11/3

11:55 am-9:48 pm

2 stops18h 53m

Anchorage

Mon 11/17

8:00 am-10:55 am

2 stops17h 55m

$923

LondonAnchorage

LGW - ANC

LGWANC

London Gatwick

Fri 10/17

10:55 am-12:22 am

1 stop22h 27m

Anchorage

Thu 10/23

2:26 am-10:55 am

2 stops23h 29m

$933

LondonAnchorage

LHR - ANC

LHRANC

London Heathrow

Tue 10/14

9:25 pm-10:45 pm

2 stops34h 20m

Anchorage

Sun 10/19

8:00 am-11:55 am

2 stops18h 55m

$934

LondonAnchorage

LGW - ANC

LGWANC

London Gatwick

Tue 10/14

3:40 pm-10:45 pm

2 stops40h 05m

Anchorage

Sun 10/19

8:00 am-2:40 pm

2 stops21h 40m

$935

LondonFairbanks

LHR - FAI

LHRFAI

London Heathrow

Wed 10/29

12:20 pm-9:58 pm

1 stop17h 38m

Fairbanks

Wed 11/5

5:55 am-7:40 pm

2 stops28h 45m

$951

LondonFairbanks

LGW - FAI

LGWFAI

London Gatwick

Wed 10/29

11:55 am-2:41 am

2 stops22h 46m

Fairbanks

Wed 11/5

5:55 am-10:55 am

2 stops20h 00m

$958

LondonFairbanks

LGW - FAI

LGWFAI

London Gatwick

Tue 10/28

11:55 am-2:41 am

2 stops22h 46m

Fairbanks

Tue 11/4

5:55 am-10:55 am

2 stops20h 00m

$1,003

LondonAnchorage

LHR - ANC

LHRANC

London Heathrow

Sun 10/12

6:40 am-1:59 am

3 stops28h 19m

Anchorage

Sun 10/19

6:00 am-6:30 pm

3 stops27h 30m

$1,011

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 43 results

...

Best time to book a flight from London to Alaska

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

Estimated round-trip 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 to Alaska

What is the cheapest month to book a flight from London to Alaska?

Currently, January is the cheapest month in which you can book a flight from London to Alaska (average of $456). Flying from London to Alaska in July is currently the most expensive (average of $642). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from LON to AK?

When flying from London to Alaska, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

How much does it cost to fly round-trip from London to Alaska?

Related info for your journey

How long is the flight from London to Alaska?
Departing from London to Alaska will take you 18h 53m. Airlines will cover a distance of 4495 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.
What are the most popular routes from London to Alaska?
Most travelers choose London Heathrow - Anchorage, London Gatwick - Anchorage or London City - Anchorage when deciding on the best route from London to Alaska.
Can I find deals for flights from London to Alaska that include hotel bookings?
Yes. In addition to deals on London to Alaska flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from London to Alaska?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from London to Alaska.
Can I find deals for business class flights from London to Alaska?
Yes. Cheapflights offers flight deals from London to Alaska by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from London to Alaska?
Currently, January is the cheapest month in which you can book a flight from London to Alaska (average of $456). Flying from London to Alaska in July is currently the most expensive (average of $642). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

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Top airline flying from London to Alaska

Airline	Cheapest	Average	Flexibility	On-time
Delta	Cheapest$1,401	Average$2,070	FlexibilityNo cancel fee	On-timeN/A

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$607+ Cheap flights from London (LON) to Alaska

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 9/23. Fares are subject to change and may not be available on all flights or dates of travel.

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Cheap flight deals from London to Alaska

Keep the following information in mind while searching for London to Alaska flight deals. Data was last updated September 15, 2025.

Round-trip from

One-way from

Popular in

Cheapest in

Average price

Find flight deals from London to Alaska

Cheapest flights from London to AlaskaExplore the most affordable flight options available from London to Alaska. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Explore the most affordable flight options available from London to Alaska. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

Cheapflights Fare Finder

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

Best time to book a flight from London to Alaska

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

Cheapflights Insights

Everything you need to know about your flight from London to Alaska

What is the cheapest month to book a flight from London to Alaska?

What is the cheapest time of day to fly from LON to AK?

Find hourly flight availability from London to Alaska. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

How much does it cost to fly round-trip from London to Alaska?

Related info for your journey

Find useful and relevant information for your journey from London to Alaska. 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 to Alaska?

What are the most popular routes from London to Alaska?

Can I find deals for flights from London to Alaska that include hotel bookings?

How can I find direct flights from London to Alaska?

Can I find deals for business class flights from London to Alaska?

What is the cheapest month to book a flight from London to Alaska?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for London to Alaska

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

Top airline flying from London to Alaska

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Cheapest flights from London to Alaska
Explore the most affordable flight options available from London to Alaska. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.