Cheap flights from London to Alaska from £342
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from London to Alaska departing on 19/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
Discover deals from 900+ travel sites with momondo.
Save money when you book flights with momondo
Big names, great deals
Big names, great deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customise your results.Trusted and free
Trusted and free
We’re completely free to use - no hidden charges or fees.Price Alerts
Price Alerts
Not ready to book? to track prices.Find the cheapest flights from London to Alaska
Cheap return flights
Cheap one-way flights
United Airlines flights from London to Alaska
Our best United Airlines deals on London to Alaska flight tickets
Scandinavian Airlines flights from London to Alaska
Our best Scandinavian Airlines deals on London to Alaska flight tickets
See travel insights to Alaska from
How to get the cheapest flight ticket from London to Alaska
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Alaska?
The cheapest month to fly to Alaska from London is in February. Flight prices, which tend to average around £779, are often lower during this time because this is during the off-season. If you’re not able to fly to Alaska in February, then September is your next best option. Flight prices from London to Alaska during September average around £830.
What is the cheapest day to depart on your flight to Alaska?
Our data shows that Thursday is the least expensive day to fly to Alaska. Tickets to fly out on this day can be as low as £830. On the other hand, Sunday is the most expensive day to depart from London because it is more convenient for both business and leisure travellers. As a result, prices tend to be around £1,110.
What is the cheapest time of day to depart on your flight to Alaska?
At midday is the cheapest time of day to fly from London to Alaska when you can find flight prices for as low as £777. Flying to Alaska at midday is an ideal time because this is during off-peak travel hours. In the afternoon is when there is more demand to fly to Alaska, so prices are often more expensive at around £1,066 per ticket.
How far in advance should I book a flight to Alaska?
You are more likely to see cheaper flights to Alaska from London when booking 20 weeks ahead of your departure date. In general, you can expect to find flights to Alaska for around £1,128 when searching 20 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Alaska from London for as low as £765 on momondo.
What is the cheapest airline that flies from London to Alaska?
British Airways, Icelandair, and Virgin Atlantic are the most popular carriers operating from London to Alaska
Which airlines fly to Alaska?
British Airways, Icelandair and Virgin Atlantic are the top three most popular airlines that fly to Alaska from London according to our data. British Airways is the first choice among our users, with 34% of people opting to fly with this airline when travelling to Alaska. Keep in mind that there are 4 different airlines that fly to Alaska on a routine basis, so you have a few additional options to choose from.
Cheap London to Alaska flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from London to Alaska
When did momondo last update prices for flights from London to Alaska?
Prices for flights from London to Alaska are refreshed on a daily basis.
How many operators does momondo search for flights from London to Alaska?
As of April 2025, there are 4 operators available to choose from for flights from London to Alaska.
How old do you have to be to fly from London to Alaska?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from London to Alaska.
What documentation or ID do you need to fly to Alaska?
The required travel and health documents for your Alaska trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Alaska. We recommend that you seek guidance from your airline or a reliable third party such as IATA.
Best airlines flying from London to Alaska
Compare and see reviews for airlines that fly from London to Alaska with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom £636 | Free Cancellation | Rating 7.0 484 reviews | |||
| PriceFrom £716 | Free Cancellation | Rating 6.6 6,815 reviews | |||
| PriceFrom £1,051 | Free Cancellation | Rating 7.4 642 reviews | |||
| PriceFrom £1,076 | Free Cancellation | Rating 7.4 8,685 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from London to Alaska?
Finding the right flight to Alaska from London is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Alaska quick and easy, saving you time and money.
Can I find flights from London to Alaska with flexible booking policies on momondo?
momondo does allow users to show only those flights to Alaska from London which offer a flexible booking policy as well as other useful filters and features.
How can momondo help me find flights from London to Alaska?
momondo helps you find the best flight between London and Alaska by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from London to Alaska right now. Can momondo alert me if prices change?
Yes momondo offers price alerts on flights to Alaska from London. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.