Cheap flights from Washington, D.C. to London from $494
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. to London departing on 9/26. 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 and deals
Big names and deals
Search 100s of travel sites to compare prices.Filter for what you want
Filter for what you want
Free Wi-Fi? Stopover? Instantly customize 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 Washington, D.C. to London
Cheap round-trip flights
Cheap one-way flights
Cheap last minute flights
Delta flights from Washington, D.C. to Southampton
Our best Delta deals on Washington, D.C. to Southampton flight tickets
Aer Lingus flights from Washington, D.C. to Southampton
Our best Aer Lingus deals on Washington, D.C. to Southampton flight tickets
See travel insights to London from
How to get the cheapest flight ticket from Washington, D.C. to Southampton
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 day to depart on your flight to Southampton?
On average, the least expensive day to fly to Southampton from Washington, D.C. is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $859. However, this price may fluctuate depending on the airline, the season, and holidays. When flying out on a Saturday, the most expensive travel day of the week, you can expect to see flight prices from Washington, D.C. to Southampton for around $1,103.
What is the cheapest time of day to depart on your flight to Southampton?
Flying to Southampton from Washington, D.C. in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $936 when looking at flights departing in the afternoon. Flights to Southampton are more costly in the morning, with an average ticket price of $1,201. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.
What is the cheapest airline that flies from Washington, D.C. to Southampton Eastleigh?
KLM, Delta, and Aer Lingus are the most popular carriers operating from Washington, D.C. to Southampton Eastleigh
What airlines fly to Southampton?
British Airways, Iberia and United Airlines are the top three most popular airlines that fly to Southampton from Washington, D.C. according to our data. British Airways is the first choice among our users, with 46% of people opting to fly with this airline when traveling to Southampton. Keep in mind that there are 18 different airlines that fly to Southampton on a routine basis, so you have a few additional options to choose from.
When to book flights from Washington, D.C. to Southampton
Cheap Washington, D.C. to Southampton (WAS to SOU) flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. to Southampton
How far is Washington, D.C. to Southampton Eastleigh by plane?
Washington, D.C. and Southampton Eastleigh are 3622.6 mi apart from one another. A reasonable flight in good conditions will take 9h 45m.
When did momondo last update prices for flights from Washington, D.C. to Southampton Eastleigh Airport?
Prices for flights from Washington, D.C. to Southampton Eastleigh Airport were last updated today.
How many operators does momondo search for flights from Washington, D.C. to Southampton Eastleigh Airport?
The number of operators available for flights from Washington, D.C. to Southampton Eastleigh Airport is 3 as of June 2025.
How old do you have to be to fly from Washington, D.C. to Southampton Eastleigh Airport?
The minimum age for a child to fly alone is five, but airlines offering an unaccompanied minor (UNMR) service may have their age restrictions, such as regulations concerning flight duration, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Washington, D.C. to Southampton Eastleigh Airport.
What documentation or ID do you need to fly to Southampton Eastleigh Airport?
The travel and health documents you'll need for your trip to Southampton Eastleigh Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Southampton Eastleigh Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
What is the most popular airline from Washington, D.C. to Southampton?
Based on momondo bookings for this flight route, the most popular airline on flight routes from Washington, D.C. to Southampton is Aer Lingus (40% of total bookings). The next most popular airlines are KLM (31%) and Delta (29%).
Best airlines flying from Washington, D.C. to Southampton
Compare and see reviews for airlines that fly from Washington, D.C. to Southampton with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $646 | Free Cancellation | Rating 7.1 1,117 reviews | |||
| PriceFrom $721 | Free Cancellation | Rating 7.8 1,358 reviews | |||
| PriceFrom $778 | Free Cancellation | Rating 8.0 7,946 reviews |
Traveling to a place near London?
Book flights to London if you plan to visit one of these locationsWhy use momondo?
Why should I use momondo to find a flight deal from Washington, D.C. to Southampton?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington, D.C. to Southampton. momondo saves you time and could save you money on your trip.
Can I find flights from Washington, D.C. to Southampton with flexible booking policies on momondo?
All flight searches from Washington, D.C. to Southampton on momondo can be filtered to show those which offer flexible booking policies.
How can momondo help me find flights from Washington, D.C. to Southampton?
Once all potential Washington, D.C. to Southampton flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.
I’m not ready to book a flight from Washington, D.C. to Southampton right now. Can momondo alert me if prices change?
Yes. momondo can track prices for Washington, D.C. to Southampton flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.