$424 Cheap Swiss International Air Lines flights from Washington to London (IAD to LHR)

Discover our best Swiss International Air Lines flight from Washington IAD to London LHR 

To find the best deals on flights to Washington from London with Swiss International Air Lines, just enter your travel dates, filter by Swiss International Air Lines, and hit search. You’ll find 2 flights to choose from and can sort by price, flight duration, and arrival or departure time.  

Return flights from Washington IAD to London LHR with Swiss International Air Lines 

If you’re planning a round trip, booking return flights with Swiss International Air Lines is usually the most cost-effective option. With airfares ranging from $675 to $675, it’s easy to find a flight that suits your budget. Prices and availability subject to change. Additional terms may apply. 

Book one-way Swiss International Air Lines flights from Washington IAD to London LHR 

A one-way ticket gives you much greater flexibility—allowing you to choose your return date, destination, and time whenever you’re ready. By booking in advance you can find great deals on one-way tickets too. Right now, a one-way Swiss International Air Lines flight from Washington to London costs from $424. Prices and availability subject to change. Additional terms may apply. 

The easy way to find cheap flights to London LHR from  Washington IAD with Swiss International Air Lines 

To find a cheap Swiss International Air Lines flight from Washington IAD to London LHR, sort your search results by price or filter by budget. Thanks to Travelocity’s Price Match Promise, if you find a better airfare deal anywhere else within 24 hours, we’ll credit or refund the difference. 

How to find our best airfare deals on Swiss International Air Lines flights from Washington IAD to London LHR 

If you’re looking for cheap flights, it helps to be flexible when it comes to your travel dates. You’ll usually find lower cost tickets when you travel during quieter months such as September, or if you book a flight with a stopover. 

Find nonstop flights from Washington IAD to London LHR with Swiss International Air Lines 

If you’re keen to be on London soil fast, don’t waste time with a stopover—filter your search results to show direct Swiss International Air Lines flights only. The journey takes around 17 hour(s) 25 min(s) – so you’ll be there before you know it. 

Flexible airline tickets for Swiss International Air Lines flights from Washington IAD to London LHR 

Make sure you’re not out of pocket if plans change by choosing a flexible ticket with penalty-free amendment and cancellation options. Use our ‘no change fee’ filter to see which flights have this option.  

There are a lot of reasons to book your flights to London LHR from  Washington IAD with Swiss International Air Lines on Travelocity 

At Travelocity our vast and up-to-the-minute inventory puts all of our best flight deals in one place. So, whether you’re traveling on business or jetting off with friends and family, you can trust Travelocity to get you there.