SJU - IAD

$151 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 7/7. 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, 0 bags

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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Everything you should know

Cheapest round-trip
$266
Typical prices: $214-$391
Frontier
Wed 8/12Mon 8/24
SJU - IAD • 1 stop
Cheapest non-stop
$371
Typical prices: $208-$444
United Airlines
Thu 7/9Sun 7/12
SJU - IAD • Non-stop
Advice from real travelers
AI-powered summary based on content written by travel experts. AI can make mistakes.
United Economy Plus adds up to 6 inches more legroom than standard economy.
Frontier Economy Bundle beats Basic Fare with carry-on and seat selection included.
Expert advice
Expert advice
Expert advice
Expert advice
Top airlines
Cheapest • from $266 (round-trip)
Best reviews • 7.4 score
Airline reviews
Airline reviews
+1
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Airline reviews
Airline reviews
+1
Nonstop flights
You can fly direct with United Airlines. Average duration is 4h 01m
Direct flights
Direct flights
+1
+1
Direct flights
Direct flights
+1
When to book
in advance
Our data shows that travelers who book at least 2 weeks in advance save around 29% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 66% price drop
Most popular
Good to know
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+1
+1
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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!
Flight Deals
Booking Insights
Expert advice
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

Wed, Aug 12 - Mon, Aug 24
Frontier Logo
6:00 am - 7:38 pm
SJU
-
IAD
13h 38m
1 stop
Frontier Logo
6:09 pm - 4:11 pm
IAD
-
SJU
22h 02m
1 stop
$266Frontier
Wed, Sep 2 - Fri, Sep 11
Frontier Logo
6:45 am - 7:44 pm
SJU
-
IAD
12h 59m
1 stop
Frontier Logo
6:46 pm - 11:38 pm
IAD
-
SJU
28h 52m
1 stop
$273Frontier
Fri, Aug 7 - Tue, Aug 11
Frontier Logo
6:00 am - 7:38 pm
SJU
-
IAD
13h 38m
1 stop
Frontier Logo
5:40 pm - 4:11 pm
IAD
-
SJU
22h 31m
1 stop
$274Frontier
Wed, Sep 2 - Tue, Sep 8
Frontier Logo
6:45 am - 7:44 pm
SJU
-
IAD
12h 59m
1 stop
Frontier Logo
11:05 am - 1:16 pm
IAD
-
SJU
26h 11m
1 stop
$277Frontier
Tue, Aug 11 - Fri, Aug 21
Frontier Logo
6:00 am - 7:38 pm
SJU
-
IAD
13h 38m
1 stop
Frontier Logo
6:22 pm - 3:58 pm
IAD
-
SJU
21h 36m
1 stop
$278Frontier
Thu, Sep 3 - Mon, Sep 7
Frontier Logo
6:00 am - 7:52 pm
SJU
-
IAD
13h 52m
1 stop
Frontier Logo
6:22 pm - 3:58 pm
IAD
-
SJU
21h 36m
1 stop
$279Frontier
Thu, Sep 3 - Tue, Sep 8
Frontier Logo
6:00 am - 7:52 pm
SJU
-
IAD
13h 52m
1 stop
Frontier Logo
5:30 pm - 11:38 pm
IAD
-
SJU
30h 08m
1 stop
$281Frontier
Thu, Jul 30 - Mon, Aug 3
Multiple Airlines Logo
6:00 am - 7:38 pm
SJU
-
IAD
13h 38m
1 stop
Multiple Airlines Logo
6:46 pm - 2:00 pm
IAD
-
SJU
19h 14m
1 stop
$284Multiple Airlines
Fri, Aug 7 - Tue, Aug 11
Frontier Logo
6:00 am - 7:38 pm
SJU
-
IAD
13h 38m
1 stop
Frontier Logo
7:48 am - 1:41 pm
IAD
-
SJU
29h 53m
2 stops
$285Frontier
Wed, Aug 12 - Mon, Aug 17
Frontier Logo
6:00 am - 7:38 pm
SJU
-
IAD
13h 38m
1 stop
Frontier Logo
5:21 pm - 2:15 am
IAD
-
SJU
8h 54m
1 stop
$290Frontier
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.

How much is a round-trip flight from San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles Intl Airport?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles Intl Airport departing in August.

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, Sunday is the cheapest day to fly and Wednesday 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 January, where tickets cost $114 (return) on average. On the other hand, the most expensive months are March and June, where the average cost of round-trip tickets is $491 and $486 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 29% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 5 weeks before departure.

Expert advice

Expert advice for your flight from San Juan to Dulles Intl

 
AI-powered summary based on content written by travel experts. AI can make mistakes.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Our travel experts
Stefanie Waldek

Stefanie Waldek

Expert on United Airlines, Frontier and IAD

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.

Gabriel Leigh

Gabriel Leigh

Expert on SJU

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.

Good to know

Low seasonSeptember
Cheapest flight$151
Best time to beat the crowds but there is an average 14% increase in price.
Most popular time to fly with an average 9% 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 5 days, the lowest price for a flight from San Juan Luis Munoz Marin Intl Airport to Washington, D.C. Dulles Intl Airport was $151 for a one-way ticket and $266 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, British Airways, Finnair, Air Canada, and Delta.

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

    The Boeing 737 MAX 9 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., United Airlines or Frontier?

    The two airlines most popular with KAYAK users for flights from San Juan to Washington, D.C. are United Airlines and Frontier. With an average price for the route of $421 and an overall rating of 7.4, United Airlines is the most popular choice. Frontier is also a great choice for the route, with an average price of $172 and an overall rating of 5.6.

  • 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 $228 or less one-way and $460 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

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Direct returns

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

Monday

United Airlines

United Airlines

Tuesday

United Airlines

United Airlines

Wednesday

United Airlines

United Airlines

Thursday

United Airlines

United Airlines

Friday

United Airlines

United Airlines

Saturday

United Airlines

United Airlines

Sunday

United Airlines

United Airlines

See more direct flights

Reviews of the top airlines flying 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.
7.4
United AirlinesOverall score based on 9863 reviews
7.7Boarding
7.3Comfort
7.1Entertainment
8.1Crew
6.6Food
Airline reviews

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

2.0 MediocreLinda, Jun 2026
LIS - IAD
Read more United Airlines reviews

Our flight was delayed 2.5 hours from Lisbon to DC so we missed our connection to Seattle that would have arrived at about 9 PM. The agent initially said we had to stay overnight in DC and there were no other options to put us on to get us to Seattle. While on board I discovered a flight via American he could have put us in but by the time we arrived in DC that was sold out. We were then put on a flight to San Francisco that was also delayed then arrived in San Francisco and our flight to Seattle was also delayed so we ended up not arriving until 2:15 am. Our son could not pick us up so we ended up having to pay over $100 to Uber home. This is the second trip with United that the flight has been delayed causing us to miss an evening in Las Vegas and we were given nothing.

MY FAMILY'S LUGGAGE WAS LOST FROM ROME TO BARI. I WAS THE ONLY ONE THAT RECEIVED MY LUGGAGE FROM ROME TO BARI. AFTER DEPLANING IN BARI, WE WASTED A LOT OF TIME AT BAG CLAIMS LOST AND FOUND REPORTING THE CLAIM AND PLEADING FOR THE BAGS TO BE DELIVERED THE NEXT DAY. WE WERE TOLD THAT IT TAKES 3 DAYS MINIMUM TO DELIVER. MY DAUGHTER AND MY GIRLFRIEND NEEDED THEIR PERSONAL THINGS AND WE WERE STAYING 3 HOURS AWAY FROM THE BARI AIRPORT. WE HAD TO DRIVE 3 HOURS TO THE AIRPORT TO COLLECT OUR LOST LUGGAGE THE NEXT DAY. WE ARE NOT HAPPY WITH THE EXPERIENCE

There were no facilities in the middle of the aircraft and premium economy was not allowed to use the business class facilities, and had to share the only two toilets at the back with economy. The upgrade to Premium was definitely not worth it

Our flight to Rome, Italy was cancelled the day of and we were never informed. We only found out because I was trying to get into my husbands account and called to get his account number. Had to pay more for worse seating on another airline.

The economy seat was much less comfortable for an international flight in terms of recline and moving space when food tray is expanded. Per entertainment, it would be amazing if I could connect my Bluetooth headset or ear phones to the entertainment screen. Or provide in-flight wifi to connect directly from my own device.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

Was great in general, try to respect time and excuses when slight changes have been made, appreciated!

Terrific in every way. On time, professional staff, multiple movie options to select, great food and drink.

There weren't enough employees at check in took awhile to get bags checked. There wasn't a wheel chair for me, I was sent to someone who turns out to work for a different airline, if My flight hadn't been delayed I probably would have missed my flight as it was, by the time I arrived at my gate, they started boarding in about 15 minutes. I don't know who took me to my gate, definitely was not the normal people who take passengers to the gate. I'm guessing she may have been in a management position. I wish I knew her name, she went beyond to help me. With that said everyone was kind, and were doing the best they could. So, I choose to say it was an Adventure, stressful start, but good. In the end went well. The situation was not only difficult for passengers but the employee's.

The staff at the check in counter was so rude. Made you feel Incompetent

Frontier scheduled a 40 minute connection in DEN. What they failed to mention was that they “close the doors” 20 mins prior to departure, which means you only have 20 mins. Not enough time. Possibly against DOT regulations. Filing complaint.

Flight was scheduled at 9:40pm. Got delayed to 10 am, the next day. crazy

The bag check, flight check-in, and onboard experience convinced my wife and me that we will actively go out of our way to avoid flying Frontier Airlines in the future. At bag check, we were informed that check-in could only be completed via the Frontier mobile app. Unfortunately, the app was extremely frustrating—sending us through repetitive, confusing loops that repeatedly forced us to decline add-on services with nearly every click. While most airline apps upsell, this one felt intentionally exhausting. As the process dragged on, we became genuinely concerned that my phone battery would die before check-in could be completed. We approached the bag check staff—who were standing together talking—and explained both our frustration and our predicament. They laughed. Later, my wife described the interaction as “gaslighting,” which felt accurate. We were then informed it would cost $25 per person simply to have our boarding passes printed. From that point forward, the tone of the experience was consistently hostile. The bag check employees were condescending and combative, behaving more like bullies than customer service staff. Unfortunately, that same attitude continued onboard. One flight attendant argued with me when I attempted to stow my backpack in the overhead bin. I explained that we had each paid $75 to check our bags specifically so we would not need to use carry-on space and could have adequate legroom. She demanded to see my ticket, pointed out that it said “no carry-on”—which I acknowledged—and I reiterated that this was precisely why we paid to check our bags. Her response was, “I don’t make the rules.” She then walked away, but not before asking if I “truly wanted to fly back to Chicago today?”—an unnecessary and unmistakable threat. It is also worth noting that despite booking our tickets together in the same transaction, we were not seated together. Upon our return to Chicago—where we could once again sit together—we compared onboard experiences. We both remarked on how unhappy the flight attendants appeared and how each of us was separately asked whether we would like to purchase a beverage. We declined. At no point was water mentioned as an option, leaving us with the clear impression that even water came at a cost—or that complimentary water, if available at all, was deliberately left unmentioned. Overall, the experience was shocking and deeply disappointing, but it was also a profound learning experience—one we will not forget and will not repeat. -Steve

Plane was hot and miserable and the crew was rude!

12 hour delay required getting on and off plane 3 times - would have at least liked to have been offered a snack or drink

They didn’t offer a water, even after I asked

Zero issues with this flight. Crew was outstanding and flight was super. Plane was clean and fine. The seats need more padding and water should be provided without cost. I recognize it's Frontier but there are some things that should still be part of the flight. But still very satisfied with the experience and quality.

They switched our terminal 3 times and we were delayed for four plus hours!!!

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

Information on your arrival and departure airports