$113 Find Cheap Flights from Washington Dulles Airport to Puerto Rico

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 Puerto Rico departing on 10/3. 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.
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1 adult, Economy

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Cheap Flights from Dulles Intl to Puerto Rico

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours
Aguadilla
Aguadilla1 stop$250
Aguadilla
Aguadilla1 stop$250

Book Cheap Dulles Intl to Puerto Rico Plane Tickets

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Dulles Intl to Puerto Rico 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 Dulles Intl to Puerto Rico

Thu, Nov 13 - Sat, Nov 22
Frontier Logo
7:26 pm - 12:18 amIAD-SJU
3h 52mnonstop
Frontier Logo
4:05 pm - 7:08 pmSJU-IAD
4h 03mnonstop
$166Frontier
Find Deal
Mon, Dec 1 - Thu, Dec 4
Frontier Logo
7:53 pm - 12:40 amIAD-SJU
3h 47mnonstop
Frontier Logo
6:00 am - 9:13 amSJU-IAD
4h 13mnonstop
$167Frontier
Find Deal
Sun, Nov 16 - Fri, Nov 21
Frontier Logo
7:26 pm - 12:18 amIAD-SJU
3h 52mnonstop
Frontier Logo
4:08 pm - 7:11 pmSJU-IAD
4h 03mnonstop
$169Frontier
Find Deal
Sun, Dec 7 - Thu, Dec 11
Frontier Logo
10:08 am - 3:02 pmIAD-SJU
3h 54mnonstop
Frontier Logo
6:00 am - 9:13 amSJU-IAD
4h 13mnonstop
$178Frontier
Find Deal
Thu, Oct 30 - Sun, Nov 2
Frontier Logo
8:26 pm - 12:18 amIAD-SJU
3h 52mnonstop
Frontier Logo
3:45 pm - 6:41 pmSJU-IAD
3h 56mnonstop
$182Frontier
Find Deal
Tue, Jan 20 - Sat, Jan 24
United Airlines Logo
8:27 am - 1:17 pmIAD-SJU
3h 50mnonstop
United Airlines Logo
8:10 am - 11:15 amSJU-IAD
4h 05mnonstop
$234United Airlines
Find Deal
Sun, Oct 5 - Wed, Oct 8
United Airlines Logo
8:39 am - 12:34 pmIAD-SJU
3h 55mnonstop
United Airlines Logo
1:05 am - 7:20 amSJU-IAD
6h 15m1 stop
$239United Airlines
Find Deal
Sun, Dec 7 - Tue, Dec 9
American Airlines Logo
6:25 am - 2:15 pmIAD-SJU
6h 50m1 stop
American Airlines Logo
3:10 pm - 11:08 pmSJU-IAD
8h 58m1 stop
$245American Airlines
Find Deal
Thu, Oct 2 - Sun, Oct 5
 Logo
7:14 pm - 2:27 amIAD-BQN
7h 13m1 stop
 Logo
3:32 am - 12:55 pmBQN-IAD
9h 23m2 stops
Thu, Dec 11 - Thu, Dec 18
 Logo
1:21 pm - 9:55 amIAD-PSE
19h 34m2 stops
 Logo
12:50 pm - 7:35 amPSE-IAD
19h 45m1 stop
Booking Insights

KAYAK's insights & trends for Dulles Intl to Puerto Rico flights

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

What is the cheapest Washington, D.C. Dulles Intl Airport to Puerto Rico flight route?

Data is based on round-trip flight searches on KAYAK over the past month.

The cheapest ticket to Puerto Rico from Washington, D.C. Dulles Intl Airport found in the last 72 hours was to San Juan, at $155 round-trip. The most popular route is from Washington, D.C. Dulles Intl Airport (IAD) to San Juan Luis Munoz Marin Intl Airport (SJU), and the cheapest round-trip airline ticket found on this route in the last 72 hours was $155.

Can I save money by flying with a layover from Washington, D.C. Dulles Intl Airport to Puerto Rico?

The average round-trip price for all non-stop flights, flights with one layover, and flights with two layovers for the route found by users searching on KAYAK in the last 2 weeks.

No, with an average price for the route of $376, prices are generally cheapest when you fly direct.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to Puerto Rico?

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 Puerto Rico, 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 Puerto Rico is June, when tickets cost $304 (return) on average. On the other hand, the most expensive months are December and April, when the average cost of round-trip tickets is $566 and $557 respectively.

What’s the cheapest day of the week to fly from Washington Dulles Airport to Puerto Rico?

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

When flying from Washington Dulles Airport to Puerto Rico, you should consider leaving on a Tuesday and avoid Fridays if you are looking for the best rates. For your return to Washington Dulles Airport, you’ll find the best rates on Thursdays and the most expensive ones on Mondays.

How far in advance should I book a flight from Washington, D.C. Dulles Intl Airport to Puerto Rico?

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 Puerto Rico, 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 Puerto Rico, you should book around 3 weeks before departure, which saves you about 18% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 16 weeks before departure.

Good to know

Low seasonOctober
Cheapest flight$113
Best time to beat the crowds with an average 9% drop in price.
Most popular time to fly and prices are also 19% lower on average.
Flight from Washington Dulles Airport to San Juan

FAQs - booking Puerto Rico flights

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

    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 Puerto Rico.

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

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

    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 from Washington Dulles Airport to Puerto Rico with an airline and back with another airline.

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

    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 from Washington Dulles Airport to Puerto Rico up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • What is the cheapest time of day to fly to Puerto Rico?

    The cheapest time of day to fly to Puerto Rico is generally in the afternoon, when round-trip flights cost $238 on average. Morning departures are around 6% cheaper than evening flights, on average. The most expensive time of day to fly to Puerto Rico is generally at night, which is peak travel time and where the average cost of a ticket is $600.

Reviews of the top 5 airlines serving from Dulles Intl to Puerto Rico

 
Need help choosing which airline to fly with from Dulles Intl to Puerto Rico? 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
8.2Boarding
7.9Comfort
7.3Food
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.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

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.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

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.

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

Nothing special. The crew never went out of their way for anything.

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

We had to deboard 2 times due to maintenance issues. They changed the plane, and then we got deviated to LAX due to maibtenance issues on the other plane, had to sleep at LAX and los a full day.

Everything was good, except the seats in economy were so close together, you could barely get out when the seat in front of your was reclined. If the airlines keep jamming in more and more seats, it will become intolerable. I will look for another airline that considers customer comfort and does not keep adding more rows of seats for more profit.

Great service on board. Boarding a bit slow due to process. Food was pretty average.

Very small cramped plane for an international flight. Everything else was good, but it was maybe the smallest comfort-wise I've ever been on for longer than 3-4 hours and the trip was 7.5

Flight was delayed 3 hours. No food and drink vouchers was provided. They offered a mini pretzel bag and water .

Staff was rude. Didn’t give water for 2 hours. Worst service

Was on time until within 1 hour of flight-how does that happen? Staff very friendly.

I liked the choice of lemon ginger tea. I think stewardesses can be more considerate of older people needs.

We were given vouchers we couldn’t use with a 5.5 hour delay

I fly UAL 7-8 times per year. This flight was not up to snuff because it boarded very late "due to unexpected delays in restocking the plane" and yet Flight Aware showed the plane had landed some 10 hours earlier--so I think they could have planned accordingly. The FA's were nice but harried. The video system had to be rebooted 3-4 times. The food service was rather abrupt; they forgot my row and when I asked for my meal, they brought it with some impatience. Overall, the flight was fine, but the little details made it feel somewhat mundane and hurried.

It took way too long to diagnose and solve the problem of a broken crew member cabin seat. Though compensation for the volunteer who left the flight was very kind.

We fly American Airlines quite a bit. And we always fly business class when traveling internationally. We were a bit disappointed with the comfort of this particular plane as well as the entertainment options.

The AA staff person who checked our bags was curt and almost rude. The FA also seemed unhappy doing her job. Overall it was like riding the school bus back in grade school.

The plane was broken so we had to change planes.

They are still charging me after taking 466 and 833 for round trip from AR to to Bradley airport from 19 to 21. Then poor experience. Am hurt and I will say it on social media. Please stay away from this airline. I see in my bank account they are still taking 644. Am trying to stop it. I used to fly United airlines and I suggest that if you don't want extra charges and good service you go back there. American airlines delayed my flight again and I was late for my meeting, no recompensation but charging me over and over.

They changed our Gate 5 times, and concourse twice. Changed our seats twice.

Pitch was very small. Knees were on the seat back in front of me.

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)

Everything was fine. I'm average height and I pack light. I'm ready for my Spirit flight.

Changing the flight time to 6:15 am on the return flight is extremely inconvenient. The flight was okay. It was on time. The crew was friendly. The seats were uncomfortable. All the upsells are annoying, and I would prefer paying a single higher fee and not have to purchase so much extra.

Spirit Airlines was ok but TRAVELHELPDESK, the 3rd party travel agent IS A JOKE! VERY RUDE CUSTOMER AGENTS ont he phone. NO HELP AT ALL. But the airlines was ok.

No Tumberlence smooth flight. Try to change the menu on Snacks.

Cancelled my flight last minute and did not help me rebook. It was a horrible experience.

No frills - because you get what you pay for. The crew was amazing!! I had plenty of room to spread out because the flight was half full. Which made it easy to sleep.

The terminal crew is so rude cabin crew is extremely rude flight is very good

Spirit is low fare air line. Food also cost you. No free food.

The flight was delayed twice with minimal explanation. The terminal and airplane were filthy. The food voucher didn’t even cover a tiny pizza from a kiosk in the terminal. All in all, a pretty miserable experience for a flight to attend a funeral

I will use spirit more New clean aircraft Excellent crew ! Quick boarding process !

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.

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