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Cheap flights from Washington, D.C. Dulles Intl Airport to San Juan from $110

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington, D.C. Dulles Intl Airport to San Juan departing on 1/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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Find the cheapest flights from Washington, D.C. Dulles Intl Airport to San Juan

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
5:35 am - 3:01 pm
IAD
-
SJU
8h 26m1 stop
Frontier Logo
7:34 pm - 8:04 am
SJU
-
IAD
13h 30m1 stop
$183Frontier
Sun, Jan 4 - Wed, Jan 14
Frontier Logo
9:18 am - 1:08 am
IAD
-
SJU
14h 50m1 stop
Frontier Logo
5:25 pm - 7:20 am
SJU
-
IAD
14h 55m1 stop
$184Frontier
Sun, Feb 8 - Wed, Feb 11
Frontier Logo
7:19 pm - 12:13 am
IAD
-
SJU
3h 54mnonstop
Frontier Logo
3:11 pm - 6:19 pm
SJU
-
IAD
4h 08mnonstop
$187Frontier
Fri, Jan 9 - Fri, Jan 16
Frontier Logo
8:26 pm - 1:20 am
IAD
-
SJU
3h 54mnonstop
Frontier Logo
6:00 am - 1:03 pm
SJU
-
IAD
8h 03m1 stop
$188Frontier
Fri, Jan 2 - Thu, Jan 15
Frontier Logo
8:26 pm - 1:20 am
IAD
-
SJU
3h 54mnonstop
Frontier Logo
9:23 pm - 7:40 am
SJU
-
IAD
11h 17m1 stop
$189Frontier
Fri, Jan 2 - Sat, Jan 10
Frontier Logo
8:26 pm - 1:20 am
IAD
-
SJU
3h 54mnonstop
Frontier Logo
3:11 pm - 6:19 pm
SJU
-
IAD
4h 08mnonstop
$190Frontier
Sun, Jan 4 - Fri, Jan 16
Frontier Logo
8:26 pm - 1:20 am
IAD
-
SJU
3h 54mnonstop
Frontier Logo
10:47 pm - 1:16 pm
SJU
-
IAD
15h 29m1 stop
$191Frontier
Fri, Jan 2 - Fri, Jan 9
Frontier Logo
9:41 am - 8:58 am
IAD
-
SJU
22h 17m1 stop
Frontier Logo
9:19 pm - 2:08 pm
SJU
-
IAD
17h 49m1 stop
$192Frontier
Thu, Jan 1 - Sat, Jan 10
Frontier Logo
9:41 am - 8:58 am
IAD
-
SJU
22h 17m1 stop
Frontier Logo
8:00 am - 8:40 am
SJU
-
IAD
25h 40m1 stop
$193Frontier
Thu, Jan 1 - Thu, Jan 22
Frontier Logo
9:58 pm - 9:23 am
IAD
-
SJU
10h 25m1 stop
Frontier Logo
10:47 pm - 1:16 pm
SJU
-
IAD
15h 29m1 stop
$194Frontier
Tue, Dec 30 - Fri, Jan 9

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

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flight tickets
Frontier
Jan 2
IAD8:26 pmWashington, D.C. Dulles Intl
3h 54m
SJU1:20 amSan Juan Luis Munoz Marin Intl
Jan 15
SJU6:00 amSan Juan Luis Munoz Marin Intl
8h 03m
1 stop
IAD1:03 pmWashington, D.C. Dulles Intl
$188
Find similar
Frontier
Jan 3
IAD8:26 pmWashington, D.C. Dulles Intl
3h 54m
SJU1:20 amSan Juan Luis Munoz Marin Intl
Jan 10
SJU9:23 pmSan Juan Luis Munoz Marin Intl
11h 17m
1 stop
IAD7:40 amWashington, D.C. Dulles Intl
$189
Find similar
Frontier
Jan 4
IAD8:26 pmWashington, D.C. Dulles Intl
3h 54m
SJU1:20 amSan Juan Luis Munoz Marin Intl
Jan 16
SJU3:11 pmSan Juan Luis Munoz Marin Intl
4h 08m
IAD6:19 pmWashington, D.C. Dulles Intl
$190
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated December 18, 2025.
Use the filters below to find and compare flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 1/4

5:35 am-3:01 pm

1 stop8h 26m

San Juan Luis Munoz Marin Intl

Wed 1/14

7:34 pm-8:04 am

1 stop13h 30m

$183

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 2/8

9:18 am-1:08 am

1 stop14h 50m

San Juan Luis Munoz Marin Intl

Wed 2/11

5:25 pm-7:20 am

1 stop14h 55m

$184

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Fri 1/9

7:19 pm-12:13 am

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Fri 1/16

3:11 pm-6:19 pm

Nonstop4h 08m

$187

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Fri 1/2

8:26 pm-1:20 am

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Thu 1/15

6:00 am-1:03 pm

1 stop8h 03m

$188

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Fri 1/2

8:26 pm-1:20 am

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Sat 1/10

9:23 pm-7:40 am

1 stop11h 17m

$189

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 1/4

8:26 pm-1:20 am

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Fri 1/16

3:11 pm-6:19 pm

Nonstop4h 08m

$190

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Fri 1/2

8:26 pm-1:20 am

Nonstop3h 54m

San Juan Luis Munoz Marin Intl

Fri 1/9

10:47 pm-1:16 pm

1 stop15h 29m

$191

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Thu 1/1

9:41 am-8:58 am

1 stop22h 17m

San Juan Luis Munoz Marin Intl

Sat 1/10

9:19 pm-2:08 pm

1 stop17h 49m

$192

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Thu 1/1

9:41 am-8:58 am

1 stop22h 17m

San Juan Luis Munoz Marin Intl

Thu 1/22

8:00 am-8:40 am

1 stop25h 40m

$193

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Tue 12/30

9:58 pm-9:23 am

1 stop10h 25m

San Juan Luis Munoz Marin Intl

Fri 1/9

10:47 pm-1:16 pm

1 stop15h 29m

$194

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to San Juan Luis Munoz Marin Intl Airport?

If you aren’t able to travel to San Juan Luis Munoz Marin Intl Airport during the month of June, then flying in October is also cheap. Prices for this month can be found on momondo for an average of $310.

What is the cheapest day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

On average, the least expensive day to fly to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $366. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Saturday is the most expensive day to depart from Washington, D.C. Dulles Intl Airport because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $458.

What is the cheapest time of day to depart on your flight to San Juan Luis Munoz Marin Intl Airport?

The cheapest time of day to fly to San Juan Luis Munoz Marin Intl Airport is at noon when flights can be purchased for as low as $238. Flights in the evening are often more expensive with an average ticket price of $431.

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

Fly from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl for the best Washington, D.C. Dulles Intl - San Juan Luis Munoz Marin Intl flight prices

How far in advance should I book a flight to San Juan Luis Munoz Marin Intl Airport?

You are more likely to see cheaper flights to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport when booking weeks ahead of your departure date. In general, you can expect to find flights to San Juan Luis Munoz Marin Intl Airport for around $406 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport for as low as $340 on momondo.

What cabin class options are available on Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl flights?

There are 4 cabin classes available to choose from on Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights?

You could potentially save up to 2% on your flight if you consider stops on a Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flight.

How have Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flight prices changed over time?

As of December 2025, prices for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights are approximately 36% cheaper when compared to flights at the same time last year.

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

Are you open to changing your travel dates? Check out the ideal times to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport (IAD to SJU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport

Best Price Found

$134

Fastest flight time

3h 45m

Direct flights

Every day
The best one-way flight to San Juan Luis Munoz Marin Intl Airport from Washington, D.C. Dulles Intl Airport in the past 72 hours is $134. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport found on momondo in the last 72 hours is $274.
The fastest flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport takes 3h 45m
Direct flights go from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport every day.
Search flight deals

  • How far is Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl by plane?

    San Juan Luis Munoz Marin Intl is 1573.5 mi away from Washington, D.C. Dulles Intl. A reasonable flight in good conditions will take 3h 45m.

  • When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Prices for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport are updated daily.

  • How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

  • How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport.

  • What documentation or ID do you need to fly to San Juan Luis Munoz Marin Intl Airport?

    The required travel and health documents for your San Juan Luis Munoz Marin Intl Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at San Juan Luis Munoz Marin Intl Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular plane model from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

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

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport with momondo
Airline
Rating
Free Cancellation
Price
FrontierPriceFrom $108Free CancellationRating
5.8
3,082 reviews
Search Frontier flights
American AirlinesPriceFrom $145Free CancellationRating
7.2
11,053 reviews
Search American Airlines flights
DeltaPriceFrom $148Free CancellationRating
7.9
8,006 reviews
Search Delta flights
Spirit AirlinesPriceFrom $151Free CancellationRating
6.3
8,190 reviews
Search Spirit Airlines flights
JetBluePriceFrom $168Free CancellationRating
7.2
2,895 reviews
Search JetBlue flights
United AirlinesPriceFrom $269Free CancellationRating
7.4
9,092 reviews
Search United Airlines flights

  • United Airlines Flights From Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport

    United Airlines flies from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport around 10 times per week, with 9,092 momondo users rating the airline 7.4/10. The cheapest United Airlines deal from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport in the last 72 hours was $269 (round-trip), much lower than the average airfare cost of $487 for United Airlines flights on this route.

Traveling to a place near San Juan?

Book flights to San Juan if you plan to visit one of these locations
Carolina
Fajardo
Dorado
Luquillo
Humacao
Caguas
Rio Grande
Bayamón

Why use momondo?

Why should I use momondo to find a flight deal from Washington, D.C. to San Juan?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Washington, D.C. to San Juan. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Washington, D.C. to San Juan with flexible booking policies on momondo?

Yes. All flights to San Juan from Washington, D.C. on momondo can be compared and filtered by various policies on offer, including flexible booking.

How can momondo help me find flights from Washington, D.C. to San Juan?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Washington, D.C. to San Juan.

I’m not ready to book a flight from Washington, D.C. to San Juan right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Washington, D.C. to San Juan now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to San Juan and let you know when they change.

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