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San Juan

$133+ Cheap flights from Dulles Intl (IAD) to San Juan

IAD — SJU
Dec 9 — Dec 161
Wed 12/9
Wed 12/16
1 adult, Economy
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Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Juan are usually found in February or January, booked 57 days in advance, depart on a Monday or Sunday and return on a Thursday

Cheap flight deals from Dulles Intl to San Juan

Cheapest flights from Dulles Intl to San Juan

Fri 11/209:35 pm -
1 stop27h 49m
Mon 11/238:53 am -
Nonstop4h 17m
Deal found 11/5$246
Fri 11/136:07 pm -
1 stop27h 47m
Sat 11/218:53 am -
Nonstop4h 17m
Deal found 11/8$247
Wed 11/1111:16 am -
1 stop14h 30m
Mon 12/73:28 am -
1 stop7h 39m
Deal found 11/6$248
Fri 11/131:54 pm -
1 stop9h 05m
Mon 12/73:28 am -
1 stop7h 39m
Deal found 11/6$249
Mon 12/148:26 pm -
1 stop28h 47m
Fri 12/186:00 am -
1 stop17h 14m
Deal found 11/4$250
Sat 12/53:34 pm -
1 stop28h 03m
Sat 12/126:25 am -
1 stop16h 25m
Deal found 11/6$251
Fri 11/131:54 pm -
1 stop27h 07m
Fri 11/208:53 am -
Nonstop4h 17m
Deal found 11/4$252
Thu 12/103:34 pm -
1 stop28h 03m
Sun 12/208:40 am -
Nonstop4h 03m
Deal found 11/4$253
Wed 12/910:35 pm -
2 stops26h 23m
Fri 12/113:28 am -
2 stops12h 21m
Deal found 11/5$254
Tue 11/1711:16 am -
1 stop14h 30m
Mon 11/238:53 am -
Nonstop4h 17m
Deal found 11/6$255
Sun 11/221:05 pm -
Nonstop3h 47m
Wed 11/258:53 am -
Nonstop4h 17m
Deal found 11/5$256
Sat 11/219:35 pm -
1 stop11h 24m
Wed 1/133:59 am -
1 stop7h 10m
Deal found 11/4$257

Find flight deals from Dulles Intl to San Juan

Round-trip from

$246
(Justfly.com)

One-way from

$133
(Mytrip)

Popular in

July

Cheapest in

February

Average price

$445
From Washington, D.C. Dulles Intl to San Juan
Search Deals
One-way flight from Washington, D.C. Dulles Intl to San Juan
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($38 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).
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Average for round-trip flights in November 2026
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Cheapflights Fare Finder

 
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Juan that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Thu 11/26

6:50 am-2:11 am

2 stops18h 21m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$184
Quickest round-trip

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Mon 11/30

8:22 am-1:15 pm

Nonstop3h 53m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$189

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Sat 12/12

5:29 pm-10:22 pm

Nonstop3h 53m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$199

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Mon 12/14

5:29 pm-10:22 pm

Nonstop3h 53m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$199

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Sun 12/6

8:22 am-1:15 pm

Nonstop3h 53m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$199

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Tue 1/19

8:22 am-1:15 pm

Nonstop3h 53m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$199

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Sat 12/5

5:29 pm-10:22 pm

Nonstop3h 53m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$199

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Tue 12/1

12:35 pm-11:58 pm

1 stop10h 23m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$223

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Mon 1/4

8:15 am-12:36 am

2 stops15h 21m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$229

Washington, D.C.San Juan

IAD Washington, D.C. Dulles Intl - SJU San Juan Luis Munoz Marin Intl

IADSJU

Washington, D.C. Dulles Intl

Sat 1/2

12:53 pm-12:36 am

2 stops10h 43m

San Juan Luis Munoz Marin Intl

Wed 12/31

12:00 am-11:00 pm

Nonstop0h 00m

$229

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 22 resultsSorted by cheapest first
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Best time to book a flight from Dulles Intl to San Juan

Have a flexible travel schedule? Discover the best time to fly to San Juan from Dulles Intl with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to San Juan

What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Juan?

Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Juan (average of $327). Flying from Washington, D.C. Dulles Intl Airport to San Juan in July is currently the most expensive (average of $538). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest time of day to fly from IAD to SJU?

It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to San Juan in the evening. Doing so could potentially save you 42% on the flight price compared to flying in the morning, which is usually more expensive.

Weekly flight availability from Washington, D.C. Dulles Intl Airport to San Juan

The most flights from IAD to PR1 are scheduled on a Friday (5 on average). You will have fewer flight options on Monday, which is when the least amount of flights are scheduled (3 on average).

How much does it cost to fly round-trip from Washington, D.C. Dulles Intl Airport to San Juan?

Airfare is below average for this route at the moment.
Washington, D.C. Dulles Intl Airport to San Juan flights typically cost between $368 and $558 in November.
The cheapest round-trip price found within the last 5 days was $246 on Frontier (Nov 20-Nov 23).

How often are flights from Washington, D.C. to San Juan delayed?

About 20% of weekly flights between Washington, D.C. and San Juan have experienced delays in the past year, with the average delay time being 127 minutes.

What is the most punctual flight time for Washington, D.C. to San Juan flights?

Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.

What day of the week experiences the fewest flight delays on this route?

Wednesday tends to have the lowest number of delays on this route, whereas Tuesday has historically faced a higher average of delays compared to other days of the week.

Which airline has the best punctuality record on Washington, D.C. to San Juan flights?

Over the last year, United Airlines have had the lowest number of delays on this route, with just 19% of flights being delayed.

How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to San Juan?

The price you pay for your flight from Washington, D.C. Dulles Intl Airport to San Juan may vary depending on when you book. For the best chance of a lower fare, look to book 56 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to San Juan?

Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to San Juan flight should consider departing on Monday evenings when fares are most often at their lowest. Thursday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

Reviews of airlines servicing San Juan

Read reviews from past customers who have flown Delta,United Airlines, andJetBlue from Washington, D.C. Dulles Intl Airport to San Juan. Users can see the overall rating for each airline as well as how each is rated in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.8
Good
8,700 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.8

Overall

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.
Delta
7.8
Good
8,700 reviews
Delta
7.8
Good
8,700 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.8

Overall

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.
United Airlines
7.3
Good
10,475 reviews
Delta
7.8
Good
8,700 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.8

Overall

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.
JetBlue
7.1
Good
3,066 reviews
Delta
7.8
Good
8,700 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.8

Overall

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.
American Airlines
7.0
Good
12,225 reviews
Delta
7.8
Good
8,700 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.8

Overall

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.
Frontier
5.5
Fair
2,506 reviews
Delta
7.8
Good
8,700 reviews

Comfort

7.8

Boarding

8.1

Entertainment

7.8

Overall

7.8

Food

7.2

Crew

8.5

Reviews

1 / 20
6.0
Good

Ellen,Oct 2026

GRR - ATL

The flight was delayed more then 30 minutes after I hurried and stressed to get to my connecting gate in Atlanta.

Related info for your journey

  • How long is the flight from Washington, D.C. Dulles Intl Airport to San Juan?

    Departing from Washington, D.C. Dulles Intl Airport to San Juan will take you 3h 53m. Washington, D.C. Dulles Intl Airport and San Juan are separated by a distance of 1573 mi. Most flights are nonstop.

  • What are the cheapest airlines flying from Washington, D.C. Dulles Intl Airport to San Juan round-trip?

    Our cheapest airline available from Washington, D.C. Dulles Intl Airport to San Juan is Frontier. Our recent data shows that you can find tickets from as low as $81 on this airline. Additional options worth looking into are Delta and JetBlue, starting at $136 and $240 round-trip. Frontier is priced at 81% lower than the current average price of a flight leaving 3 months from now.

  • What are the cheapest airlines to fly from Washington, D.C. Dulles Intl Airport to San Juan one-way?

    The cheapest airline one-way is Frontier, with whom users have recently found tickets for as low as $54. However, be on the lookout for offers from Delta and United Airlines, as they are both options that can get you from Washington, D.C. Dulles Intl Airport to San Juan for a low price.

  • What are the most reliable airlines from Washington, D.C. Dulles Intl Airport to San Juan?

    Looking for the most reliable airlines to get you to your destination on time? Our data shows these are most likely to get you from Washington, D.C. Dulles Intl Airport to San Juan on time: Air Canada (83%), United Airlines (83%), Brussels Airlines (71%).

  • What are the cheapest flights from Washington, D.C. Dulles Intl Airport to San Juan?

    On average you can expect to pay $732 for a flight from Washington, D.C. Dulles Intl Airport to San Juan. The cheapest flight overall is $94 while the most popular route, (Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl) is currently priced at $187.

  • Can I find deals for flights from Dulles Intl to San Juan that include hotel bookings?

    Yes. In addition to deals on Dulles Intl to San Juan flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Dulles Intl to San Juan?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Dulles Intl to San Juan.

  • Can I find deals for business class flights from Dulles Intl to San Juan?

    Yes. Cheapflights offers flight deals from Dulles Intl to San Juan by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Juan?

    Currently, February is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Juan (average of $327). Flying from Washington, D.C. Dulles Intl Airport to San Juan in July is currently the most expensive (average of $538). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 5 airlines flying from Dulles Intl to San Juan

AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$81Average$315FlexibilityNo cancel feeOn-time62%
DeltaCheapest$136Average$342FlexibilityNo cancel feeOn-timeN/A
JetBlueCheapest$240Average$464FlexibilityNo cancel feeOn-time62%
United AirlinesCheapest$273Average$495FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$301Average$438FlexibilityNo cancel feeOn-time71%

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