$548 Cheap Flights from Washington (IAD) to Rennes (RNS)

View $548 flight on Wed, Mar 4, 2026Opens in a new window

Popular airlines from Washington Dulles Intl. Airport (IAD) to Rennes (RNS-Saint-Jacques)

Cheap Flights from Washington to Rennes (IAD-RNS)

Prices were available within the past 7 days and start at $548 for one-way flights and $803 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Delta
Wed, Mar 11 - Tue, Mar 31
IAD
Washington
RNS
Rennes
$803 Roundtrip, found 2 days ago
$803
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Mar 11 from Washington to Rennes, returning Tue, Mar 31, priced at $803 found 2 days ago
Delta
Wed, Mar 11 - Tue, Mar 31
IAD
Washington
RNS
Rennes
$805 Roundtrip, found 2 days ago
$805
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Mar 11 from Washington to Rennes, returning Tue, Mar 31, priced at $805 found 2 days ago
Delta
Wed, Mar 11 - Tue, Mar 31
IAD
Washington
RNS
Rennes
$809 Roundtrip, found 2 days ago
$809
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Mar 11 from Washington to Rennes, returning Tue, Mar 31, priced at $809 found 2 days ago
Delta
Wed, Mar 11 - Tue, Mar 31
IAD
Washington
RNS
Rennes
$813 Roundtrip, found 2 days ago
$813
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Mar 11 from Washington to Rennes, returning Tue, Mar 31, priced at $813 found 2 days ago
Delta
Wed, Mar 11 - Tue, Mar 31
IAD
Washington
RNS
Rennes
$819 Roundtrip, found 2 days ago
$819
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Mar 11 from Washington to Rennes, returning Tue, Mar 31, priced at $819 found 2 days ago
Delta
Tue, Mar 10 - Mon, Mar 30
IAD
Washington
RNS
Rennes
$821 Roundtrip, found 2 days ago
$821
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Mar 10 from Washington to Rennes, returning Mon, Mar 30, priced at $821 found 2 days ago
Delta
Tue, Mar 10 - Mon, Mar 30
IAD
Washington
RNS
Rennes
$825 Roundtrip, found 2 days ago
$825
Roundtrip
found 2 days ago
Select Delta flight, departing Tue, Mar 10 from Washington to Rennes, returning Mon, Mar 30, priced at $825 found 2 days ago
KLM
Mon, Mar 9 - Tue, Mar 31
IAD
Washington
RNS
Rennes
$826 Roundtrip, found 2 days ago
$826
Roundtrip
found 2 days ago
Select KLM flight, departing Mon, Mar 9 from Washington to Rennes, returning Tue, Mar 31, priced at $826 found 2 days ago
KLM
Tue, Mar 10 - Mon, Mar 30
IAD
Washington
RNS
Rennes
$831 Roundtrip, found 2 days ago
$831
Roundtrip
found 2 days ago
Select KLM flight, departing Tue, Mar 10 from Washington to Rennes, returning Mon, Mar 30, priced at $831 found 2 days ago
Delta
Wed, Mar 11 - Tue, Mar 31
IAD
Washington
RNS
Rennes
$835 Roundtrip, found 2 days ago
$835
Roundtrip
found 2 days ago
Select Delta flight, departing Wed, Mar 11 from Washington to Rennes, returning Tue, Mar 31, priced at $835 found 2 days ago
Virgin Atlantic
Sun, Mar 8 - Mon, Mar 30
IAD
Washington
RNS
Rennes
$836 Roundtrip, found 2 days ago
$836
Roundtrip
found 2 days ago
Select Virgin Atlantic flight, departing Sun, Mar 8 from Washington to Rennes, returning Mon, Mar 30, priced at $836 found 2 days ago

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS) cost?
Get a cheap one-way flight from $548 or cheap return flight from $803 from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS)?
The cheapest month to fly from IAD to RNS is March, when demand is low. Off-peak months are usually when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS)?
Expedia's filter tool lets you easily compare travel time, airlines and fares all in one place. Customize the search to your preferences, then sort by "Price (lowest to highest)" to find the carrier with the cheapest IAD to RNS flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS)?
You'll have to take a flight with a layover if you're traveling from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from IAD to RNS?
Friday is generally the busiest day for flights, while Tuesday is often the quietest.* Just remember that flight schedules can vary based on a range of factors, such as the time of year and airline.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS)?
To land at Saint-Jacques Airport (RNS) on time, pick a flight that takes off from Washington Dulles Intl. Airport (IAD) before 3 PM. The chance of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS) last-minute?
Booking your plane ticket from IAD to RNS shortly before your getaway is generally more expensive. However, if you're flexible with your travel dates and times, you could land a cheap last-minute fare.
Is it cheaper to book an IAD to RNS flight and hotel package?
Securing an IAD to RNS flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels in one place. Select from our extensive range of accommodations and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Saint-Jacques Airport (RNS)?
In most cases, you're able to reschedule or cancel your IAD to RNS flight. However, additional charges may apply, especially if your booking was made over 24 hours ago. Double-check your itinerary for the airline's fees and rules on flight changes, or if you'd like further details, visit our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Saint-Jacques
Airlines serving
Air France, Delta, KLM
Roundtrip price
$803
Distance
3691 mi

Book with confidence

Washington to Rennes Flights

The cheapest times to fly from Washington to Rennes

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to Rennes are during the month of March. You can find some of the cheapest flights from Washington to Rennes with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to Rennes

Sunday is one of the best days to book for cheap flights from Washington to Rennes: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to Rennes

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to Rennes in 2025. You can also book with separate airlines for your outbound and return journeys, from $548 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to Rennes flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to Rennes airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to Rennes Flights

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*Available to One Key members.