IAD - SJU

$64 Find Cheap Flights from Washington Dulles Airport to San Juan

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Dulles Intl to San Juan departing on 7/8. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult

KAYAK searches hundreds of travel sites at once for deals on flights to San Juan Luis Munoz Marin Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to San Juan.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Washington, D.C. to San Juan.
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Flights Deals

Cheap Flight Deals from Dulles Intl to San Juan (IAD-SJU)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.

Recent round-trip flight deals from Dulles Intl to San Juan

KAYAK's recommended round-trip deals from the most popular airlines that fly from Dulles Intl to San Juan.
Discover the best prices for you by selecting your travel dates on KAYAK.
Frontier Logo
12:10 pm - 4:02 pmIAD-SJU
3h 52mnonstop
Frontier Logo
7:40 am - 11:33 amSJU-IAD
3h 53mnonstop
$148Frontier
Find Deal
Sun, May 25 - Sun, Jun 1
Frontier Logo
12:10 pm - 4:02 pmIAD-SJU
3h 52mnonstop
Frontier Logo
7:20 am - 11:15 amSJU-IAD
3h 55mnonstop
$153Frontier
Find Deal
Sun, May 25 - Thu, May 29
United Airlines Logo
6:48 am - 2:44 pmIAD-SJU
7h 56m1 stop
United Airlines Logo
7:25 am - 11:24 amSJU-IAD
3h 59mnonstop
$247United Airlines
Find Deal
Sun, May 25 - Sun, Jun 1
American Airlines Logo
8:02 pm - 11:10 amIAD-SJU
15h 08m1 stop
American Airlines Logo
7:15 am - 12:02 amSJU-IAD
16h 47m1 stop
$255American Airlines
Find Deal
Wed, May 28 - Wed, Jun 4
United Airlines Logo
8:40 am - 12:34 pmIAD-SJU
3h 54mnonstop
United Airlines Logo
1:05 am - 7:19 amSJU-IAD
6h 14m1 stop
$281United Airlines
Find Deal
Sun, Jun 1 - Wed, Jun 4
American Airlines Logo
8:02 pm - 11:10 amIAD-SJU
15h 08m1 stop
American Airlines Logo
7:15 am - 12:02 amSJU-IAD
16h 47m1 stop
$283American Airlines
Find Deal
Tue, May 27 - Wed, Jun 4
Delta Logo
1:20 pm - 10:47 pmIAD-SJU
9h 27m1 stop
Delta Logo
5:43 pm - 12:28 amSJU-IAD
6h 45m1 stop
$285Delta
Find Deal
Sat, May 24 - Thu, May 29
 Logo
11:54 am - 9:43 amIAD-SJU
45h 49m3 stops
 Logo
8:12 pm - 2:32 pmSJU-IAD
18h 20m2 stops
Sun, Jun 1 - Fri, Jun 6
Delta Logo
12:30 pm - 11:46 pmIAD-SJU
11h 16m1 stop
Delta Logo
2:15 pm - 10:59 pmSJU-IAD
8h 44m1 stop
$345Delta
Find Deal
Sat, Aug 16 - Fri, Aug 22
 Logo
12:23 pm - 4:13 pmIAD-SJU
3h 50mnonstop
 Logo
2:36 am - 12:44 pmSJU-IAD
10h 08m1 stop
Thu, Jun 12 - Sun, Jun 15
Expert advice

Expert advice for your flight from Dulles Intl to San Juan

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
IAD

For a smooth departure from IAD, use the AeroTrain for quick access between terminals, especially during peak hours.

Read more about IADby Stefanie Waldek
SJU

Upon arrival at SJU, consider renting a car for island exploration. It's convenient and allows access to Puerto Rico's hidden gems.

Read more about SJUby Gabriel Leigh
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on IAD

Stefanie Waldek

Stefanie Waldek

Stefanie Waldek is a freelance space, travel, and design writer based in Saratoga Springs, NY. Her words have appeared in Space.com, Travel + Leisure, Condé Nast Traveler, Architectural Digest, and House Beautiful, among other publications. An expert in aviation and expedition cruising, Stefanie is frequently up in the air or on the sea, likely en route to Antarctica or the Arctic.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on SJU

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more
Useful Info

KAYAK's insights & trends for Dulles Intl to San Juan flights

Get data-powered insights and trends into flights from Dulles Intl to San Juan to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from Washington Dulles Airport to San Juan?

The average price of all round-trip flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport clicked on KAYAK for each day over the last 12 months.

If your flying dates are flexible, you should consider flying to San Juan on a Tuesday, as we generally find the cheapest rates on that day for this route. On the other hand, Friday is the most expensive day to fly from Washington Dulles Airport to San Juan. For your return ticket, we recommend flying on a Friday and avoiding Sundays for the best deals.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport is October, where tickets cost $407 (return) on average. On the other hand, the most expensive months are December and April, where the average cost of round-trip tickets is $623 and $560 respectively.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonSeptember
High seasonJune
Cheapest flight$64
Best time to beat the crowds but there is an average 4% increase in price.
Most popular time to fly and prices are also 0% lower on average.
Flight from Washington Dulles Airport to San Juan

When to book flights from Dulles Intl to San Juan

Are your dates flexible? Find out the best times to travel from Dulles Intl to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking Washington Dulles Airport to San Juan flights

  • What is the cheapest flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    In the last 3 days, the lowest price for a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport was $64 for a one-way ticket and $148 for a round-trip.

  • Do I need a passport to fly between Washington Dulles Airport and San Juan?

    Yes, you'll most likely have to show a valid passport before boarding the plane in Washington Dulles Airport and on arrival in San Juan.

  • Which airports will I be using when flying from Washington Dulles Airport to San Juan?

    Washington Dulles Airport and San Juan are both served by 1 main airport. You will leave Washington Dulles Airport from Washington, D.C. Dulles Intl and will be arriving at San Juan Luis Munoz Marin Intl.

  • Which airlines offer Wi-Fi service onboard planes from Washington Dulles Airport to San Juan?

    JetBlue, and American Airlines offer inflight Wi-Fi service on the Washington Dulles Airport to San Juan flight route.

  • Which aircraft models fly most regularly from Washington Dulles Airport to San Juan?

    The Airbus A320neo is the aircraft model that flies most regularly on the Washington Dulles Airport to San Juan flight route.

  • Which airline alliances offer flights from Washington Dulles Airport to San Juan?

    Star Alliance is the only airline alliance operating flights between Washington Dulles Airport and San Juan.

  • On which days can I fly direct from Washington Dulles Airport to San Juan?

    There are nonstop flights from Washington Dulles Airport to San Juan on a daily basis.

  • Which is the best airline for flights from Washington, D.C. to San Juan, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from Washington, D.C. to San Juan are Delta and United Airlines. With an average price for the route of $391 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $510 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Washington Dulles Airport to San Juan?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Washington Dulles Airport to San Juan.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Washington Dulles Airport to San Juan?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan from Washington Dulles Airport is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Washington Dulles Airport to San Juan?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to San Juan with an airline and back to Washington Dulles Airport with another airline. Booking your flights between Washington Dulles Airport and SJU can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Washington Dulles Airport to San Juan?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to San Juan from Washington Dulles Airport up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

KAYAK’s top tips for finding a cheap flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $178 or less one-way and $296 or less round-trip.

Prefer to fly direct from Washington Dulles Airport to San Juan?

Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, which days they fly and book direct flights.

Direct departures

Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl

Monday

Air Canada, United Airlines

Air Canada, United Airlines

Tuesday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

Wednesday

Air Canada, United Airlines

Air Canada, United Airlines

Thursday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

Friday

Air Canada, United Airlines

Air Canada, United Airlines

Saturday

Air Canada, Brussels Airlines, United Airlines

Air Canada, Brussels Airlines, +1 more

Sunday

Air Canada, Brussels Airlines, Frontier, +1 more

Air Canada, Brussels Airlines, +2 more

See more direct flights

Direct returns

San Juan Luis Munoz Marin Intl to Washington, D.C. Dulles Intl

Monday

Air Canada, United Airlines

Air Canada, United Airlines

Tuesday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

Wednesday

Air Canada, United Airlines

Air Canada, United Airlines

Thursday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

Friday

Air Canada, United Airlines

Air Canada, United Airlines

Saturday

Air Canada, United Airlines

Air Canada, United Airlines

Sunday

Air Canada, Frontier, United Airlines

Air Canada, Frontier, +1 more

See more direct flights
See more direct flights

Top 5 airlines serving from Dulles Intl to San Juan

 
See real verified KAYAK customer reviews for airlines flying from Washington, D.C. to San Juan. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Dulles Intl to San Juan? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 7934 reviews
7.3Food
8.2Boarding
8.5Crew
7.9Entertainment
7.9Comfort
Airline reviews

Our bag was lost so that made unnecessary chaos On our trip

6.0 GoodBarbara, Apr 2025JFK - FCO
Read more Delta reviews

Our bag was lost so that made unnecessary chaos On our trip

Delta is my preferred airline. I've traveled with them for years. On time in most cases, good communication, easy to use app. Most planes are pretty nice. I was on a CRJ 700/900 however, which was pretty badly aged inside and needed a refresh. No infotainment, unreliable wifi, best to download before boarding or bring a book. Food choices are really just snacks on this flight, nice variety but about what you'd expect. Great staff and prompt in departure and early arrival too. Overall quite satisfied.

Crew was friendly Love the entertainment in the seat head rest.

Delta flight was on time, seats were comfortable, and crew was nice.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

It was an overnight flight and I desperately needed coffee before we landed, but Delta does only one beverage service, and that is shortly after takeoff, not before landing at 5 am.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

Everything is good except the dinner and breakfast. The sandwich is very delicious. Toilet is clean, I only use one of them. Flight attendants are very nice. 👍👍

A bit rush for transit. Food and entertainment are not available

Boarding was a little difficult. The gate area at O'Hare was very small and crowded due to multiple gates in the area. Could not hear the intercom, so had to rely on signage to see when my group was boarding and the signage was blocked by passengers standing in the gate. Flight was great and we arrived in Montreal on time.

Multiple delays and not straight answer from the United team

For economy, it was very good. Staff was great, they even let some of us change seats for more leg room... Put an empty seat between us which was fantastic for a 12hr flight. Onboard entertainment was excellent, I think over 200 choices of movies/tv/etc The bad was the barely/nonfunctional wifi that cost either $16.99 or 1700 miles (full flight). It was atrocious... Definitely the worst of the last 3 long haul major airlines I was on the last few months.

Stewardess spilled orange juice on my clothes/seat no help no apology just threw napkins at me to clean the mess up. Not Happy.

Smooth flight. Boarding was chaotic. Could not hear the gate agent over the intercom. People were lined up in the wrong lines. Groups one and two were told to board through line one and group 3 through line 2. All very confusing. Once in the air, the flight was smooth. There was no entertainment option on this aircraft, even though it was a larger aircraft.

I didn’t get on plane. Passport being processed by consulate with visa application. Tried to cancel through underpricer after purchasing cacelling for any reason. No dice, they are thieves.

When I booked it on Kayak it aaid that I wasn't allowed hamd luggage. I called United Airlines and it took them 6 minutes to figure out if I was allowed free hand luggage. Surely something that simple they should be able to tell me instantly.

We were delayed in Toronto on the tarmac for THREE hours with no clear indication as to why except that it was not a safety hazard. Pilot did apologize more than once but even he was unable to explain why exactly we were delayed. I overheard the stewards saying that the captain was very frustrated with the situation as well because he was not able to explain why except it had something to do with water supply or system on the aircraft and now we needed to wait for an engineer to approve the aircraft for flight. It was very frustrating and distressing as a passenger and we should have been given complimentary meals at the very least.

Uncomfortable seats and flight attendant was rude as she insisted on waking up my husband to ask him if he wanted a drink. When he said that he was sleeping, she replied “without an attitude “. He was seated at 8c

Wonderful as usual except for other guests that were unruly and not kept in check by the Crew.

The flight was initially delayed, then cancelled. American Airlines says the cancellation was weather related, though the actual weather was not bad in both Washington and Providence and between. There were very few cancellations that day. In fact, AA2120 from Washington, DC to Boston flew with a minor delay at about the same time. So, the weather somehow affected only this particular flight AA5230. The next available flight was the following morning. The American Airlines refused to reimburse accommodation (hotel at DCA)

Fine. On time, cabin service was fine, bag arrived. All good. Flying into DCA so did not collide with any helicopters, which is also good. Horrid incident that could have and should have been prevented.

Good experience but the snacks are not gluten free, so I cannot eat them.

Standard. No different than a discount carrier on a short trip.

Everything was great. Boarding, early departure, early arrival, and deplaning were smooth. Smooth flight.

I blame kayak for my last trip to dca. Kayak cancelled my direct flight and put on a one stop flight and made lost whole day from my vacation and had not even refunded my ticket.

I flew out of Reagan National. My flight was delayed, delayed, delayed, and then canceled ...THREE TIMES over TWO DAYS. Staff were seemingly not empowered to provide information on why the flights were screwed up. A real nightmare.

I had two wonderful flights - very relaxing and got me there early!

I mean, it’s Spirit. But it was frustrating to have our flight canceled, get bumped to a later flight, and then Spirit was unwilling to check our bag until 4 hours before our flight… tell us we could not sit in the waiting area’s chairs… and really negative experience getting checked in and dropping the bag.

Not having it be changed after we bought the flight tickets from a direct flight getting in at a reasonable time to a connecting flight red eye of 9 hours, so that we would lose our 35 dollars in nonrefundable insurance would've been great! Our country really does need low-cost carrier options, but this type of "service" ain't it. Fortunately, had a little better success with them flying to and from San Juan PR last month at least.

All was good expecting the seats need a bit of cushion. Besides that I can’t complain.

You get what you pay for, and the flights went smoothly. There’s no reclining chairs, no screens, And there isn’t always wifi, but the plane was clean and staff was friendly and the takeoff/landing were smooth.

The only positive is that the flight made it both ways. Getting charged for every little thing after the cost of the ticket itself is comical, considering how the plane and services are as bottom-tier as possible. The self check-in kiosks are useless. It’s nice to think that you can print your boarding pass, tag your checked bag, and then just drop it off. But no, they still make you go through the line once you finish- what’s the point of the self check-in then? Any questions for the staff seem like the biggest inconvenience and were met with condescending responses. This was my first and now last time ever flying with Spirit. After all the extra costs, subpar plane and staff, I see no value. I’d rather drive the 13 hours than give Spirit another dime.

The flight was fine however what started as a reasonable priced ticket could have become an overpriced ticket with additional charge for carry on as well as checked bag $79 per bag per person each way. Additional charge for choosing one’s seat, additional charge for beverage and snack, we were on what was described as a new plane yet there were no audio/visual on the jet. A bare bones service but not at a bare bones price. Will think twice before flying Spirit again. 😕

Flight was delayed a bit, but that was expected (and updated), so really not bad at all for the price. Could’ve used one less email asking me to upgrade my seat; otherwise no significant complaints

I love Spirit. New aircraft, great cabin service, the airfares are low cost which helps me visit my hospitalized daughter anytime I can without paying a fortune.

Flight was 2hours late they had no crew or the pilot.

I paid for streaming wifi and the connection was poor.

The reps working at the airport counter were dumber than a second coat of paint.

My costume jewelry was stolen out of my bag. Got to airport and my bag weighed 45 pounds- 5 pounds over cost me $100 Long lines in tier one. No entertainment No WiFi no free drinks or snacks

Not very good. Paid in excess of $400 for assigned seating for my family and that was not provided. I want that money back.

The seats were hard molded plastic covered in plastic vinyl. And the scam to charge people extra to sit together. Don’t they know we can just ask someone to trade seats. And watching the staff separate young children from parents… super classy. We had to guilt them into offering up our seats. This companies policies suck. Don’t give them your money.

The seats were awful, hard plastic covered in sheet vinyl. The airline tries to scam you into paying extra to get seat together when the flight wasn’t full. They were going to separate a family with young children but my wife who had a row to herself gave up her seat so the young mom could be with her young boys. I’m never giving this airline my money again.

It was a short flight so no food or entertainment….

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

Cancelled and declined to find alternatives Earlier flight is 2 days later Sent the cancellation notification very late, wish I knew earlier would have stayed to watch the Miami open final game Very disappointing service

The worst flight of my life. Never will I fly frontier again

Everything you need to know for your flight from Dulles Intl to San Juan

Information on your arrival and departure airports

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