Cheap flights from London to Las Vegas from £425

In general, January is the cheapest month to fly from London to Las Vegas. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around £554. If you’re not able to fly to Las Vegas in January, then February is your next best option. Flight prices from London to Las Vegas during February average around £579.

The cheapest day to depart on your flight to Las Vegas is on a Thursday when prices can be found for as low as £672. This is often the case because there is less demand to fly during this day of the week. 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 £748.

Our data shows that the cheapest London to Las Vegas flights are usually those with departure times at midday. Our users have found flights to Las Vegas at midday for as low as £655. Flights to Las Vegas are more costly in the morning, with an average ticket price of £774. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from London Heathrow to Las Vegas Harry Reid Intl for the best London - Las Vegas Harry Reid Intl flight prices

You are more likely to see cheaper flights to Las Vegas from London when booking weeks ahead of your departure date. In general, you can expect to find flights to Las Vegas for around £663 when searching weeks before you fly. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Las Vegas from London for as low as £612 on momondo.

There are 4 cabin classes available to choose from on London to Las Vegas flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

SWISS, British Airways, and Lufthansa are the most popular carriers operating from London to Las Vegas Harry Reid Intl

Virgin Atlantic, British Airways and American Airlines are the top three most popular airlines that fly to Las Vegas from London according to our data. Virgin Atlantic is the first choice among our users, with 49% of people opting to fly with this airline when travelling to Las Vegas. Keep in mind that there are 15 different airlines that fly to Las Vegas on a routine basis, so you have a few additional options to choose from.

Historically, on average around 18% of flights between London and Las Vegas have experienced a delay on any given week. The average delay length over the past 12 months has been 133 minutes.

Generally, flights departing in the morning tend to experience fewer delays. Flights departing in the early afternoon have, in the past, seen delays more frequently in comparison.

Tuesday is statistically the day of the week that experiences the fewest delays on this flight route. Sunday has historically seen more delays on average compared to the rest of the week.

According to our data, Virgin Atlantic have had the fewest delays on this route over the last 12 months, with about 14% of their flights experiencing any sort of delay.

Seattle (SEA) was the most common stop: 28% of momondo users choosing one-stop flights on this route connected there.

Flights via Seattle (SEA) offer the lowest average return price of £493.

Flights connecting via Paris (CDG) have the shortest average one-way travel time: 13h 10m.

Phoenix (PHX) has the shortest average stopover time for this route: 1h 08m.

As of November 2026, there are 9 flights per day flying from London to Las Vegas. The most common time of day flights depart is 16:00, with 100% of flights taking off in the afternoon.

The number of flights available between London and Las Vegas is 63 per week as of November 2026. The most frequent departure day is Mon, with 14% of weekly flights leaving on this day.