SJU - IAD

$117 Find Cheap Flights from San Juan to Washington Dulles Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Juan to Dulles Intl departing on 10/2. 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
1 adult, Economy

KAYAK searches hundreds of travel sites at once for deals on flights to Washington, D.C. Dulles Intl Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Juan to Washington, D.C., as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Juan to Washington, D.C., as well as popular online travel agencies
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Flight Deals

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

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Juan to Dulles Intl 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.
Discover the best prices for you by selecting your travel dates on KAYAK.

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

Sun, Nov 2 - Sun, Nov 9
Frontier Logo
3:45 pm - 6:41 pmSJU-IAD
3h 56mnonstop
Frontier Logo
7:26 pm - 12:18 amIAD-SJU
3h 52mnonstop
$180Frontier
Find Deal
Thu, Oct 16 - Thu, Oct 23
Frontier Logo
4:26 pm - 8:22 pmSJU-IAD
3h 56mnonstop
Frontier Logo
9:07 pm - 12:59 amIAD-SJU
3h 52mnonstop
$181Frontier
Find Deal
Sat, Nov 22 - Sat, Nov 29
Frontier Logo
4:05 pm - 7:08 pmSJU-IAD
4h 03mnonstop
Frontier Logo
7:53 pm - 12:40 amIAD-SJU
3h 47mnonstop
$197Frontier
Find Deal
Thu, Oct 2 - Tue, Oct 7
United Airlines Logo
4:55 pm - 8:52 pmSJU-IAD
3h 57mnonstop
United Airlines Logo
8:39 am - 12:34 pmIAD-SJU
3h 55mnonstop
$234United Airlines
Find Deal
Fri, Dec 5 - Wed, Dec 10
United Airlines Logo
5:50 pm - 8:55 pmSJU-IAD
4h 05mnonstop
United Airlines Logo
5:32 pm - 10:22 pmIAD-SJU
3h 50mnonstop
$237United Airlines
Find Deal
Tue, Nov 4 - Mon, Nov 10
Delta Logo
7:15 am - 4:57 pmSJU-IAD
10h 42m1 stop
Delta Logo
12:31 pm - 11:13 pmIAD-SJU
9h 42m1 stop
$245Delta
Find Deal
Thu, Oct 9 - Mon, Oct 13
 Logo
4:26 pm - 8:22 pmSJU-IAD
3h 56mnonstop
 Logo
9:28 pm - 1:44 amIAD-SJU
28h 16m1 stop
Wed, Oct 8 - Sun, Oct 12
 Logo
3:19 pm - 7:07 pmSJU-IAD
27h 48m1 stop
 Logo
9:07 pm - 12:59 amIAD-SJU
3h 52mnonstop
Thu, Nov 6 - Tue, Nov 11
Delta Logo
7:15 am - 2:36 pmSJU-IAD
8h 21m1 stop
Delta Logo
6:00 am - 2:10 pmIAD-SJU
7h 10m1 stop
$265Delta
Find Deal
Thu, Oct 30 - Tue, Nov 4
American Airlines Logo
4:45 pm - 9:55 amSJU-IAD
17h 10m1 stop
American Airlines Logo
7:55 am - 5:05 pmIAD-SJU
8h 10m1 stop
$272American Airlines
Find Deal

Everything you should know

Our travelers' advice
AI-generated summary based on content written by travel experts
United's Economy Plus offers extra legroom for comfort.
Frontier's Premium Bundle includes priority boarding.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Frontier
Cheapest • from $180 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to book
2 weeks
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 17% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
July
Cheapest • 42% price drop
December
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$180
Overall average: $480
Frontier
Sun 11/2Sun 11/9
SJU - IAD • Non-stop
Cheapest one-way
$117
Typical prices: $128-361
United Airlines
Thu 10/2
SJU - IAD • Non-stop
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Dulles Intl!
Expert advice

Expert advice for your flight from San Juan to Dulles Intl

 
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.
Airlines
United Airlines

United's Economy Plus seats offer up to six inches more legroom than standard economy seats.


United offers free messaging on most flights; check Wi-Fi coverage before purchasing internet access.

Frontier

Frontier's Premium Bundle offers priority boarding and extra legroom for just $20 more than Economy.


Avoid Basic Fare to ensure carry-on and seat selection; Economy Bundle offers these at a lower cost.

Read more about Frontierby Stefanie Waldek
Airports
SJU

San Juan Airport is efficient and compact. Stock up on food before late-night flights as most shops close early.

Read more about SJUby Gabriel Leigh
IAD

The Silver Line Metro connects Dulles to downtown D.C. in about 50 minutes, offering a convenient travel option.

Read more about IADby Stefanie Waldek
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, Frontier and 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
Booking Insights

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

Get data-powered insights and trends into flights from San Juan to Dulles Intl 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 San Juan to Washington Dulles Airport?

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

If you are looking for a flight deal from San Juan to Washington Dulles Airport, look for departures on Thursdays and avoid leaving on a Monday, as it's usually the priciest day. When flying back from Washington Dulles Airport, Tuesday is the cheapest day to fly and Friday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles 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 San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles Intl Airport is July, where tickets cost $223 (return) on average. On the other hand, the most expensive months are April and November, where the average cost of round-trip tickets is $545 and $480 respectively.

How far in advance should I book a flight from San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles 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 San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles 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 San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles Intl Airport, you should book around 2 weeks before departure, which saves you about 17% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$117
Best time to beat the crowds with an average 24% drop in price.
Most popular time to fly with an average 12% increase in price.
Flight from San Juan to Washington Dulles Airport

When to book flights from San Juan to Dulles Intl

Are your dates flexible? Find out the best times to travel from San Juan to Dulles Intl 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 San Juan to Washington Dulles Airport flights

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

    In the last 3 days, the lowest price for a flight from San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles Intl Airport was $117 for a one-way ticket and $180 for a round-trip.

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

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

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

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

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

    All the following airlines offer inflight Wi-Fi service on the San Juan to Washington Dulles Airport flight route: JetBlue, Iberia, Finnair, British Airways, Air Canada, and Delta.

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

    The Airbus A321neo is the aircraft model that flies most regularly on the San Juan to Washington Dulles Airport flight route.

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

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

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

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

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

    The two airlines most popular with KAYAK users for flights from San Juan to Washington, D.C. are Delta and United Airlines. With an average price for the route of $431 and an overall rating of 7.9, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $457 and an overall rating of 7.4.

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

    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 San Juan to Washington Dulles Airport.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Washington Dulles Airport from San Juan 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 San Juan to Washington Dulles Airport?

    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 Washington Dulles Airport with an airline and back to San Juan with another airline. Booking your flights between San Juan and IAD 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 San Juan to Washington Dulles Airport?

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

  • Looking for a cheap flight? 25% of our users found flights on this route for $160 or less one-way and $272 or less round-trip.

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

 
Direct data is based off flight results for the next 60 days. Find direct flights from all airlines flying direct from San Juan Luis Munoz Marin Intl to Washington, D.C. Dulles Intl.
Find which airlines fly direct from San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles Intl Airport, which days they fly and book direct flights.

Direct departures

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

Monday

United Airlines, Frontier

United Airlines, Frontier

Tuesday

United Airlines, Frontier

United Airlines, Frontier

Wednesday

United Airlines

United Airlines

Thursday

Frontier, United Airlines

Frontier, United Airlines

Friday

United Airlines, Frontier

United Airlines, Frontier

Saturday

United Airlines, Frontier

United Airlines, Frontier

Sunday

Frontier, United Airlines

Frontier, United Airlines

See more direct flights

Direct returns

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

Monday

United Airlines, Frontier

United Airlines, Frontier

Tuesday

United Airlines, Frontier

United Airlines, Frontier

Wednesday

United Airlines

United Airlines

Thursday

Frontier, United Airlines

Frontier, United Airlines

Friday

United Airlines, Frontier

United Airlines, Frontier

Saturday

United Airlines, Frontier

United Airlines, Frontier

Sunday

Frontier, United Airlines

Frontier, United Airlines

See more direct flights

Reviews of the top 3 airlines serving from San Juan to Dulles Intl

 
See real verified KAYAK customer reviews for airlines flying from San Juan to Washington, D.C.. 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 San Juan to Dulles Intl? 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.
7.9
DeltaOverall score based on 7960 reviews
7.9Entertainment
7.3Food
8.2Boarding
7.9Comfort
8.5Crew
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

The airport crew helped a lot, what I didn’t like? We were not informed that we needed to pick our luggage’s, if the crew at the luggage center didn’t tell me I would have been home without my belongings, I was heading out to my next connecting flight while looking for what gate to go to, I asked one of the crews for help, he told me and he also told me to not forget to grab my luggage’s which was chocking, because on my way out the country that wasn’t required, I just hope none of your customers lost their luggage’s because of this.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

The flight crew was friendly. I tried to adjust my seat online ahead of time but no option existed without additional fees. My friend asked at the gate about a seat change and was able to make it happen. That was great! The flight crew moved a very tall gentleman and his companion which allowed us to have more space which was nice. Overall, good experience. Appreciated the blanket and pillow.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

Mechanic delay in addition to a 2 hour change in takeoff time was frustrating.

IAD with the archaic people movers is just a place to be avoided.

Overall, it was good. I was seating next to a wonderful lady and did not notice how time flew. Thanks

This is the best united airlines flight that I took. The crew was very friendly and the food was tasty!

It is clear that someone knew, and competent, is in charge of food at United Airlines at least for the international flights. I was flying in coach, but the choices of the dinner were excellent. Tasty, and appropriate size. I had the beef, which was a little bit like a shepherds pie, and it was good. Nothing comparable has been served on a United flight in years. It will not be confused with three star food, but it is very good for airline food. Even better was the breakfast choice between a cinnamon roll and a breakfast sandwich. I chose the breakfast sandwich which was absolutely delicious and which I would happily order again at my local Starbucks or Panera. It is clear that someone knew indifferent is in charge of the food and it’s about time.

Had one staff that was not pleasant. Seems they are stressed with too many people to care for.

I would have liked an opportunity to move to a different seat ( even would have checked in my hand luggage)as I had health issues where I didn't have to clamber over the passenger next to me to for toilet use/ movement [ She was a highly unpleasant neighbor to sit next to]. In addition, I found that my European phone plan had run out of data and so I was not receiving emails from yourselves on airport wifi to be able to check in online and verifications difficult as did not accept the ticket number I had. I asked for an extra blanket but was told there was none. Then I saw other passengers receiving them. I couldn't eat the food and asked for snacks : Stewardess said " on the way" but they did not bring. The best bit was the check in process in Lisbon. Very efficient. However, I did not understand why we had to collect our bags at Washington then go through customs again. It was not explained. I also with my leg and health issue had approximately mile walk to the gate ( which then changed) . There appeared to be no moving walkways or help provided.

The attendant were friendly. I suggest you have a medical attendant on board every flight so that in case someone is sick , he/she will help them.

We had a very long diversion and our food voucher didn’t work because the restaurants were closed

United airlines, mediocre at best. No issues , nothing great . Worked for me

Turbulent taking off & landing to Dulles from Raleigh. Flight from Dulles to Tokyo very good!!

Seats were new and comfortable. Staff was fine. Missed my connection due to weather -which wasn’t their fault- but got no help at all. Gate staff sent me to customer service, which was and stayed unstaffed. Sign with QR code directed me to call or chat. Chat was useless. Call was returned after an hour. No itinerary offered by Frontier could get me home in less than 30 hours. Rebooked with another airline and got a partial refund that came to about 10 percent of what I paid to get home.

Finally a Frontier on time and efficient. I've had problems before with your airline, but this time everything went fine.

The experience was good. No frills but I got there safe and sound and on time.

Great for the price. No wifi or entertainment, but gate agents and crew were fantastic and we boarded quickly and left on time.

sluggish boarding and arrival procedures, fake nice flight attendants, and lots of delays.

Disaster. They lied every step of the way. We ended up being delayed due to crew and then allegedly abandoned the flight because of a curfew at LGA. No rebooking to LGA at any reasonable time. No hotel. No meal vouchers. Had to sleep in the airport and fly to Newark instead. Will never fly Frontier again.

What I expected, nickeled and dined and a frontier flight attendant loudly complained about her job and lack of communication as she headed to the gate on her cell phone. Not professional.

As every law enforcement agency I could imagine surrounded the plane and we didn’t disembark for 2 hours and then had to stick around for another hour to go get our personal belongings after leaving them behind and being bused away from the plane, it was scary and inconvenient. We were given no information as to why this was happening. Lack of communication with passengers was disappointing.

After boarding and un-boarding twice over 6+hours, the flight was canceled.

Severe turbulence. Captain never came on to reassure passengers after things settled down.

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

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