What is the cheapest airline that flies from Washington, D.C. Dulles Intl to San Juan?

United Airlines, American Airlines, and Frontier are the most popular carriers operating from Washington, D.C. Dulles Intl to San Juan

What airlines fly to San Juan?

United Airlines, Frontier and Delta are the top three most popular airlines that fly to San Juan from Washington, D.C. Dulles Intl Airport according to our data. United Airlines is the first choice among our users, with 67% of people opting to fly with this airline when traveling to San Juan. Keep in mind that there are 6 different airlines that fly to San Juan on a routine basis, so you have a few additional options to choose from.

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

Prices for flights from Washington, D.C. Dulles Intl Airport to San Juan are refreshed on a daily basis.

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

As of July 2025, there are 6 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to San Juan.

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

The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to San Juan.

What documentation or ID do you need to fly to San Juan?

The travel and health documents required for your trip to San Juan can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Juan. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$68 Cheap Flights from Washington, D.C. Dulles Intl Airport to San Juan in 2025

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to San Juan on average per day?

As of July 2025, 2 flights take off from Washington, D.C. Dulles Intl Airport and land in San Juan each day. The most common flight departure time for this route is 8:00AM, with 63% of daily flights taking off at noon.

Q: How many flights depart from Washington, D.C. Dulles Intl Airport to San Juan on average per week?

As of July 2025, 16 flights take off from Washington, D.C. Dulles Intl Airport and land in San Juan each week. The most common flight departure day for this route is Thu, with 19% of weekly flights taking off on this day.

1 adult

0 bags

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Not ready to book? to track prices.

Search flight deals

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to San Juan

Round-trip

One-way

Last minute

Direct

Cheap round-trip flights

10:09 am - 3:01 pmIAD-SJU

3h 52mnonstop

6:25 am - 9:21 amSJU-IAD

3h 56mnonstop

$91Frontier

Find Deal

Sun, Nov 9 - Thu, Nov 13

5:32 pm - 10:22 pmIAD-SJU

3h 50mnonstop

8:30 am - 11:35 amSJU-IAD

4h 05mnonstop

$136United Airlines

Find Deal

Sun, Nov 9 - Thu, Nov 13

11:44 am - 3:36 pmIAD-SJU

3h 52mnonstop

7:00 am - 10:56 amSJU-IAD

3h 56mnonstop

$140Frontier

Find Deal

Thu, Oct 23 - Sun, Oct 26

12:31 pm - 4:28 pmIAD-SJU

3h 57mnonstop

6:51 am - 10:47 amSJU-IAD

3h 56mnonstop

$143Frontier

Find Deal

Sun, Aug 17 - Thu, Aug 21

10:09 am - 3:01 pmIAD-SJU

3h 52mnonstop

6:25 am - 9:21 amSJU-IAD

3h 56mnonstop

$177Frontier

Find Deal

Sun, Nov 9 - Thu, Nov 13

8:39 am - 12:34 pmIAD-SJU

3h 55mnonstop

7:30 am - 11:35 amSJU-IAD

4h 05mnonstop

$181United Airlines

Find Deal

Mon, Oct 20 - Tue, Oct 28

2:18 pm - 10:10 pmIAD-SJU

7h 52m1 stop

7:10 am - 11:50 pmSJU-IAD

16h 40m1 stop

$195American Airlines

Find Deal

Tue, Oct 21 - Sun, Oct 26

6:00 am - 1:10 pmIAD-SJU

7h 10m1 stop

5:41 pm - 12:13 amSJU-IAD

6h 32m1 stop

$215Delta

Find Deal

Mon, Sep 8 - Fri, Sep 19

12:27 pm - 9:59 pmIAD-SJU

9h 32m1 stop

2:05 pm - 11:01 pmSJU-IAD

8h 56m1 stop

$225Delta

Find Deal

Sat, Oct 18 - Sat, Oct 25

8:14 pm - 1:25 pmIAD-SJU

16h 11m1 stop

2:30 pm - 11:55 pmSJU-IAD

10h 25m1 stop

$243American Airlines

Find Deal

Sun, Dec 7 - Thu, Dec 11

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

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to San Juan flight tickets

Frontier

Nov 9

IAD10:09 amWashington, D.C. Dulles Intl

3h 52m

SJU3:01 pmSan Juan Luis Munoz Marin Intl

Nov 13

SJU6:25 amSan Juan Luis Munoz Marin Intl

3h 56m

IAD9:21 amWashington, D.C. Dulles Intl

$91

Find similar

Frontier

Oct 23

IAD11:44 amWashington, D.C. Dulles Intl

3h 52m

SJU3:36 pmSan Juan Luis Munoz Marin Intl

Oct 26

SJU7:00 amSan Juan Luis Munoz Marin Intl

3h 56m

IAD10:56 amWashington, D.C. Dulles Intl

$140

Find similar

Frontier

Aug 17

IAD12:31 pmWashington, D.C. Dulles Intl

3h 57m

SJU4:28 pmSan Juan Luis Munoz Marin Intl

Aug 21

SJU6:51 amSan Juan Luis Munoz Marin Intl

3h 56m

IAD10:47 amWashington, D.C. Dulles Intl

$143

Find similar

United Airlines flights from Washington, D.C. Dulles Intl Airport to San Juan

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to San Juan flight tickets

United Airlines

Nov 9

IAD5:32 pmWashington, D.C. Dulles Intl

3h 50m

SJU10:22 pmSan Juan Luis Munoz Marin Intl

Nov 13

SJU8:30 amSan Juan Luis Munoz Marin Intl

4h 05m

IAD11:35 amWashington, D.C. Dulles Intl

$136

Find similar

United Airlines

Oct 20

IAD8:39 amWashington, D.C. Dulles Intl

3h 55m

SJU12:34 pmSan Juan Luis Munoz Marin Intl

Oct 28

SJU7:30 amSan Juan Luis Munoz Marin Intl

4h 05m

IAD11:35 amWashington, D.C. Dulles Intl

$181

Find similar

United Airlines

Nov 9

IAD6:30 amWashington, D.C. Dulles Intl

8h 10m

1 stop

SJU3:40 pmSan Juan Luis Munoz Marin Intl

Nov 13

SJU5:50 pmSan Juan Luis Munoz Marin Intl

4h 05m

IAD8:55 pmWashington, D.C. Dulles Intl

$186

Find similar

momondo 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

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 11/9

10:09 am-3:01 pm

Nonstop3h 52m

San Juan Luis Munoz Marin Intl

Thu 11/13

6:25 am-9:21 am

Nonstop3h 56m

$91

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 11/9

5:32 pm-10:22 pm

Nonstop3h 50m

San Juan Luis Munoz Marin Intl

Thu 11/13

8:30 am-11:35 am

Nonstop4h 05m

$136

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Thu 10/23

11:44 am-3:36 pm

Nonstop3h 52m

San Juan Luis Munoz Marin Intl

Sun 10/26

7:00 am-10:56 am

Nonstop3h 56m

$140

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 8/17

12:31 pm-4:28 pm

Nonstop3h 57m

San Juan Luis Munoz Marin Intl

Thu 8/21

6:51 am-10:47 am

Nonstop3h 56m

$143

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 11/9

10:09 am-3:01 pm

Nonstop3h 52m

San Juan Luis Munoz Marin Intl

Thu 11/13

6:25 am-9:21 am

Nonstop3h 56m

$177

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 10/20

8:39 am-12:34 pm

Nonstop3h 55m

San Juan Luis Munoz Marin Intl

Tue 10/28

7:30 am-11:35 am

Nonstop4h 05m

$181

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Tue 10/21

2:18 pm-10:10 pm

1 stop7h 52m

San Juan Luis Munoz Marin Intl

Sun 10/26

7:10 am-11:50 pm

1 stop16h 40m

$195

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Mon 9/8

6:00 am-1:10 pm

1 stop7h 10m

San Juan Luis Munoz Marin Intl

Fri 9/19

5:41 pm-12:13 am

1 stop6h 32m

$215

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sat 10/18

12:27 pm-9:59 pm

1 stop9h 32m

San Juan Luis Munoz Marin Intl

Sat 10/25

2:05 pm-11:01 pm

1 stop8h 56m

$225

Washington, D.C.San Juan

IAD - SJU

IADSJU

Washington, D.C. Dulles Intl

Sun 12/7

8:14 pm-1:25 pm

1 stop16h 11m

San Juan Luis Munoz Marin Intl

Thu 12/11

2:30 pm-11:55 pm

1 stop10h 25m

$243

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to San Juan

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

Prices

Airlines

Other information

What is the cheapest month to fly to San Juan?

If you’re not able to fly to San Juan in June, then October is your next best option. Flight prices from Washington, D.C. Dulles Intl Airport to San Juan during October average around $392.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to San Juan is on a Tuesday when prices can be found for as low as $370. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $481.

What is the cheapest time of day to depart on your flight to San Juan?

The cheapest time of day to fly to San Juan is at noon when flights can be purchased for as low as $238. If you have a flexible travel schedule, then try to avoid flying in the evening when prices are $698 on average. Flights to San Juan from Washington, D.C. Dulles Intl Airport in the evening are generally more expensive because this time of day is more convenient for travelers’ schedules.

What is the cheapest Washington, D.C. Dulles Intl to San Juan 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 flight prices

How far in advance should I book a flight to San Juan?

You are more likely to see cheaper flights to San Juan 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 for around $444 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San Juan from Washington, D.C. Dulles Intl Airport for as low as $344 on momondo.

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

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

Cheap Washington, D.C. Dulles Intl Airport to San Juan 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

Best Price Found	$68
Fastest flight time	3h 50m
Direct flights	Every day
Airports in San Juan	1 airport

The best one-way flight to San Juan from Washington, D.C. Dulles Intl Airport in the past 72 hours is $68. The best round-trip flight deal from Washington, D.C. Dulles Intl Airport to San Juan found on momondo in the last 72 hours is $91.

The fastest flight from Washington, D.C. Dulles Intl Airport to San Juan takes 3h 50m

Direct flights go from Washington, D.C. Dulles Intl Airport to San Juan every day.

There is 1 airport near San Juan: San Juan Luis Munoz Marin Intl (SJU)

Search flight deals

How far is Washington, D.C. Dulles Intl to San Juan by plane?
San Juan is 1569.0 mi away from Washington, D.C. Dulles Intl. By plane, this route typically takes 3h 50m.
When did momondo last update prices for flights from Washington, D.C. Dulles Intl Airport to San Juan?
Prices for flights from Washington, D.C. Dulles Intl Airport to San Juan are refreshed on a daily basis.
How many operators does momondo search for flights from Washington, D.C. Dulles Intl Airport to San Juan?
As of July 2025, there are 6 operators available to choose from for flights from Washington, D.C. Dulles Intl Airport to San Juan.
How old do you have to be to fly from Washington, D.C. Dulles Intl Airport to San Juan?
The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Washington, D.C. Dulles Intl Airport to San Juan.
What documentation or ID do you need to fly to San Juan?
The travel and health documents required for your trip to San Juan can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at San Juan. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to San Juan with momondo

Airline	Rating	Free Cancellation	Price
Frontier	PriceFrom $115	Free Cancellation	Rating 5.9 3,239 reviews	Search Frontier flights
Spirit Airlines	PriceFrom $135	Free Cancellation	Rating 6.3 8,048 reviews	Search Spirit Airlines flights
JetBlue	PriceFrom $203	Free Cancellation	Rating 7.2 2,914 reviews	Search JetBlue flights
American Airlines	PriceFrom $224	Free Cancellation	Rating 7.2 10,000 reviews	Search American Airlines flights
Delta	PriceFrom $234	Free Cancellation	Rating 8.0 7,981 reviews	Search Delta flights
United Airlines	PriceFrom $284	Free Cancellation	Rating 7.4 8,900 reviews	Search United Airlines flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Washington, D.C. to San Juan for you.

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

Yes. momondo enables you to select and highlight flights to San Juan from Washington, D.C. with this policy.

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?

Yes momondo offers price alerts on flights to San Juan from Washington, D.C.. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your San Juan trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Start using Trips

Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

1 adult

Tue 8/5

Tue 8/12

Email me momondo's favorite deals

By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

San Juan Isla Grande Airport

San Juan Luis Munoz Marin Intl Airport

Fly to other destinations from Washington, D.C. Dulles Intl Airport

Flights from Washington, D.C. Dulles Intl to Savannah/Hilton Head

Flights from Washington, D.C. Dulles Intl to Wilmington New Hanover County

Flights from Washington, D.C. Dulles Intl to Tweed-New Haven

Flights from Washington, D.C. Dulles Intl to South Bend/Michiana

Flights from Washington, D.C. Dulles Intl to Nashville Intl

Flights from Washington, D.C. Dulles Intl to Asheville Regional

Cheap flights from Washington, D.C. Dulles Intl Airport to San Juan from $68

Big names and deals

Big names and deals

Filter for what you want

Filter for what you want

Trusted and free

Trusted and free

Price Alerts

Price Alerts

Find the cheapest flights from Washington, D.C. Dulles Intl Airport to San Juan

Cheap round-trip flights

Cheap one-way flights

Cheap last minute flights

Cheap direct flights

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

Our best Frontier deals on Washington, D.C. Dulles Intl Airport to San Juan flight tickets

United Airlines flights from Washington, D.C. Dulles Intl Airport to San Juan

Our best United Airlines deals on Washington, D.C. Dulles Intl Airport to San Juan flight tickets

momondo 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.

See travel insights to San Juan from

How to get the cheapest flight ticket from Washington, D.C. Dulles Intl Airport to San Juan

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?

If you’re not able to fly to San Juan in June, then October is your next best option. Flight prices from Washington, D.C. Dulles Intl Airport to San Juan during October average around $392.

What is the cheapest day to depart on your flight to San Juan?

The cheapest day to depart from Washington, D.C. Dulles Intl Airport to San Juan is on a Tuesday when prices can be found for as low as $370. The most expensive day to fly to San Juan is Friday, with ticket prices averaging around $481.

What is the cheapest time of day to depart on your flight to San Juan?

What is the cheapest Washington, D.C. Dulles Intl to San Juan 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 flight prices

How far in advance should I book a flight to San Juan?

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

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

What is the cheapest airline that flies from Washington, D.C. Dulles Intl to San Juan?

United Airlines, American Airlines, and Frontier are the most popular carriers operating from Washington, D.C. Dulles Intl to San Juan

What airlines fly to San Juan?

How many flights depart from Washington, D.C. Dulles Intl Airport to San Juan on average per day?

As of July 2025, 2 flights take off from Washington, D.C. Dulles Intl Airport and land in San Juan each day. The most common flight departure time for this route is 8:00AM, with 63% of daily flights taking off at noon.

How many flights depart from Washington, D.C. Dulles Intl Airport to San Juan on average per week?

As of July 2025, 16 flights take off from Washington, D.C. Dulles Intl Airport and land in San Juan each week. The most common flight departure day for this route is Thu, with 19% of weekly flights taking off on this day.

Cheap Washington, D.C. Dulles Intl Airport to San Juan 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

Best Price Found

Fastest flight time

Direct flights

Airports in San Juan

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

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

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

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

What documentation or ID do you need to fly to San Juan?

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

Compare and see reviews for airlines that fly from Washington, D.C. Dulles Intl Airport to San Juan with momondo

Why use momondo?

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

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

How can momondo help me find flights 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?

An easier way to manage your San Juan trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.

Find better results for your trip to Puerto Rico

Fly into one of these airports located in San Juan

Airports listed have a maximum distance of 7.1 mi from San Juan