$74 Cheap Flights from San Juan (SJU) to Washington (IAD)

View $74 flight on Thu, May 22, 2025Opens in a new window

Popular airlines from Luis Munoz Marin Intl. Airport (SJU) to Washington Dulles Intl. Airport (IAD)

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Find available prices by choosing your travel dates.

Cheap Flights from San Juan to Washington (SJU-IAD)

Prices were available within the past 7 days and start at $74 for one-way flights and $148 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, May 22 - Sun, May 25
SJU
San Juan
IAD
Washington
$148 Roundtrip, found 4 hours ago
$148
Roundtrip
found 4 hours ago
Select Frontier Airlines flight, departing Thu, May 22 from San Juan to Washington, returning Sun, May 25, priced at $148 found 4 hours ago
Frontier Airlines
Thu, May 22 - Tue, May 27
SJU
San Juan
IAD
Washington
$154 Roundtrip, found 12 hours ago
$154
Roundtrip
found 12 hours ago
Select Frontier Airlines flight, departing Thu, May 22 from San Juan to Washington, returning Tue, May 27, priced at $154 found 12 hours ago
Frontier Airlines
Thu, May 22 - Tue, May 27
SJU
San Juan
IAD
Washington
$165 Roundtrip, found 1 day ago
$165
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, May 22 from San Juan to Washington, returning Tue, May 27, priced at $165 found 1 day ago
Frontier Airlines
Thu, May 22 - Sun, Jun 8
SJU
San Juan
IAD
Washington
$169 Roundtrip, found 13 hours ago
$169
Roundtrip
found 13 hours ago
Select Frontier Airlines flight, departing Thu, May 22 from San Juan to Washington, returning Sun, Jun 8, priced at $169 found 13 hours ago
Frontier Airlines
Thu, Jun 5 - Tue, Jun 17
SJU
San Juan
IAD
Washington
$170 Roundtrip, found 7 hours ago
$170
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Thu, Jun 5 from San Juan to Washington, returning Tue, Jun 17, priced at $170 found 7 hours ago
Frontier Airlines
Thu, Jun 5 - Sun, Jun 15
SJU
San Juan
IAD
Washington
$174 Roundtrip, found 5 days ago
$174
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Thu, Jun 5 from San Juan to Washington, returning Sun, Jun 15, priced at $174 found 5 days ago
Frontier Airlines
Thu, Jun 26 - Sun, Jul 6
SJU
San Juan
IAD
Washington
$184 Roundtrip, found 23 hours ago
$184
Roundtrip
found 23 hours ago
Select Frontier Airlines flight, departing Thu, Jun 26 from San Juan to Washington, returning Sun, Jul 6, priced at $184 found 23 hours ago
United
Thu, May 22 - Sun, May 25
SJU
San Juan
IAD
Washington
$187 Roundtrip, found 4 hours ago
$187
Roundtrip
found 4 hours ago
Select United flight, departing Thu, May 22 from San Juan to Washington, returning Sun, May 25, priced at $187 found 4 hours ago
Delta
Thu, Jul 10 - Tue, Jul 15
SJU
San Juan
IAD
Washington
$225 Roundtrip, found 1 day ago
$225
Roundtrip
found 1 day ago
Select Delta flight, departing Thu, Jul 10 from San Juan to Washington, returning Tue, Jul 15, priced at $225 found 1 day ago
American Airlines
Wed, May 14 - Tue, May 20
SJU
San Juan
IAD
Washington
$345 Roundtrip, found 5 hours ago
$345
Roundtrip
found 5 hours ago
Select American Airlines flight, departing Wed, May 14 from San Juan to Washington, returning Tue, May 20, priced at $345 found 5 hours ago
Flights from San Juan (SJU) to Washington (IAD)
Origin airport
Luis Munoz Marin Intl.
Destination airport
Washington Dulles Intl.
Airlines serving
American Airlines, Delta, Frontier Airlines, United
Roundtrip price
$148
Distance
1574 mi

San Juan to Washington Flights

The cheapest times to fly from San Juan to Washington

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 San Juan to Washington are during the month of May. You can find some of the cheapest flights from San Juan to Washington with Expedia's search tool and vast selection of airlines.

The best time to book a flight from San Juan to Washington

Sunday is one of the best days to book for cheap flights from San Juan to Washington: 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 San Juan to Washington

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 San Juan to Washington in 2025. You can also book with separate airlines for your outbound and return journeys, from $74 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 San Juan to Washington 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 San Juan to Washington 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.

Frequently asked questions

How long does it take to fly from Isla Verde Intl. Airport to IAD?
United Airlines operates a direct flight jetting off from Isla Verde Intl. Airport at 7:25AM and landing at Washington Dulles Intl. Airport (IAD) at 11:23AM — a flight duration of 3 hours and 58 minutes. Pick the best seat available, bring some things to keep you occupied and the time will race by.
Is it cheaper to buy a plane ticket from SJU to Dulles Intl. Airport last minute?
Booking your flight from Isla Verde Intl. Airport to IAD at the last minute could save you a tidy sum if you’re lucky to find an awesome deal. However, airfares typically don’t come down in price as the departure date nears. If you wait, flights could also be booked solid or the best seats gone (because no one wants the middle seat). If you’d rather not take any chances, book well in advance of when you want to leave. Note that some of the biggest deals can be found up to 12 months in advance. If your preferred carrier hasn’t released its fares yet, check back regularly as offers are updated on Expedia all the time.
What airline has the least delays from SJU to Washington Dulles Intl. Airport (IAD)?
If you’d rather not be stuck in the departure lounge — or worse, have your trip upended because of a flight delay — fly with United Airlines. Around 88% of its SJU to IAD services get in on schedule. You can check your flight status before you get to the airport through the free Expedia App. It also delivers real-time alerts about other important info, like gate number changes and directions to your hotel. Think of it as a handy travel companion in your pocket!
What airports do you fly into for Washington from San Juan?
With Washington Dulles Intl. Airport (IAD), Ronald Reagan Washington National Airport (DCA) and Baltimore Washington Intl. Thurgood Marshall Airport (BWI) to select from, traveling from San Juan to Washington is a snap. The city’s key hub, Washington Dulles Intl. Airport (IAD), is roughly 25 mi west of the center. Along with ticket costs, consider things like bus or train options from the airport and the distance to your hotel when deciding where to fly into. Get your Washington adventure off on the right foot by discovering White House and United States Capitol.
What are the most popular departure times for flights from SJU to IAD?
For United Airlines flights from SJU to Dulles Intl. Airport, the busiest time is between 7:00 AM - 8:00 AM. If you want to avoid delays, book a morning flight. This way you’re likely to escape the heavy air traffic that builds up around airports as the day goes by.
Can I change the date of my flight from SJU to Dulles Intl. Airport?
Quickly and easily make changes to your Isla Verde Intl. Airport to IAD ticket through the Expedia Trips portal. But before amending dates or times, read through the rules and conditions in your itinerary to find out what the airline will allow you to do and if fees apply. Some carriers have a change fee per person, plus any difference in prices. However, if you booked in the last 24 hours, you may be able to cancel for free and book new flights. You can also stop by our Customer Service portal for further details and to chat with our Virtual Agent.

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*Available to One Key members.