£378 Cheap Flights from Washington (IAD) to Southampton (SOU)

You can find one-way and return flights from IAD to SOU with Expedia. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see our cheapest fares first, and use the Price Tracking tool to receive alerts when IAD to SOU ticket fares go up or down.

The cheapest months to fly from IAD to SOU are typically during off-peak season when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you are able to. Use the calendar view in your search to see which months have low fares on this route.

Enter IAD to SOU and your travel dates, then apply the 'Nonstop' filter to see only direct flights.

To find a cheap flight from Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.

The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.

There are approximately 27 connecting flights per day from Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU). Some common connection points include Dublin (DUB), Roissy-Charles de Gaulle (CDG), and Hartsfield-Jackson Atlanta Intl. (ATL).

Sort flights by "Departure (earliest)" on Expedia to find the earliest flight from IAD to SOU. To compare more early flights, use the "Early Morning" and "Morning" filters in your search.

You'll generally find the most flights from Washington Dulles Intl. (IAD) to Southampton (SOU) on a Saturday, with around 51 flights available. This gives you a good selection of options for your journey. Major airlines on this route include United, Aer Lingus, and British Airways. Saturdays tend to have notably more flight options compared to other days of the week, such as Tuesdays which see around 38 flights.

The most popular departure times for flights from Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU) are in the afternoon, from 3pm to 6pm. Many major carriers, including Aer Lingus, KLM and Delta, offer flights during this window. Many travellers prefer this time as it allows for a full morning before heading to the airport, and you'll arrive at your destination at a reasonable hour.

There are no nonstop flights from Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU). For connecting flights, a one-stop journey typically takes around 21 hours 18 minutes. If you have two or more stops, your travel time will be longer, usually around 17 hours 30 minutes. The distance covered on this route is approximately 5,860 kilometers. Keep in mind that actual flight times can vary due to factors like layover duration, routing, and weather conditions.

You can fly business class between IAD and SOU. Airlines that offer business class service on this route include:

• KLM

It's easy to earn miles on a Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.

*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.

Typically, booking a last minute flight from Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.

Securing a Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.

If you booked your Washington, DC (IAD-Washington Dulles Intl.) to Southampton (SOU) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.