Cheap flights from Las Vegas to London from $379

The month of February is, on average, the cheapest month to fly to London Heathrow Airport from Las Vegas, with most prices found around $741. If you’re not able to fly to London Heathrow Airport in February, then January is your next best option. Flight prices from Las Vegas to London Heathrow Airport during January average around $842.

Our data shows that Monday is the least expensive day to fly to London Heathrow Airport. Tickets to fly out on this day can be as low as $982. The most expensive day to fly to London Heathrow Airport is Friday, with ticket prices averaging around $1,167.

According to our data, the cheapest time of day to fly to London Heathrow Airport is in the evening. momondo users have found flights departing from Las Vegas to London Heathrow Airport in the evening for as low as $1,026. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights in the afternoon are often more expensive with an average ticket price of $1,145.

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

You are more likely to see cheaper flights to London Heathrow Airport from Las Vegas when booking weeks ahead of your departure date. In general, you can expect to find flights to London Heathrow Airport for around $1,045 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to London Heathrow Airport from Las Vegas for as low as $929 on momondo.

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

You could potentially save up to 5% on your flight if you consider stops on a Las Vegas to London Heathrow Airport flight.

As of September 2026, prices for Las Vegas to London Heathrow Airport flights are approximately 81% more expensive when compared to flights at the same time last year.

JetBlue, KLM, and United Airlines are the most popular carriers operating from Las Vegas Harry Reid Intl to London Heathrow

British Airways, Virgin Atlantic and Delta are the top three most popular airlines that fly to London Heathrow Airport from Las Vegas according to our data. British Airways is the first choice among our users, with 53% of people opting to fly with this airline when traveling to London Heathrow Airport. Keep in mind that there are 7 different airlines that fly to London Heathrow Airport on a routine basis, so you have a few additional options to choose from.

Dublin (DUB) was the most common stop: 25% of momondo users choosing 1-stop flights on this route connected there.

Flights via Chicago (ORD) offer the lowest average round-trip price of $755.

Flights connecting via Chicago (ORD) have the shortest average one-way travel time: 12h 55m.

Los Angeles (LAX) has the shortest average layover time for this route: 2h 25m.

As of September 2026, 11 flights take off from Las Vegas and land in London Heathrow Airport each day. The most common flight departure time for this route is 10:00PM, with 76% of daily flights taking off in the evening.

As of September 2026, 83 flights take off from Las Vegas and land in London Heathrow Airport each week. The most common flight departure day for this route is Mon, with 17% of weekly flights taking off on this day.