IAD - SJU

$134 Find Cheap Flights from Washington Dulles Airport to San Juan - Compare and Save

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Everything you should know

Cheapest round-trip
$293
Typical prices: $338-$578
Frontier
Fri 11/30Thu 12/6
IAD - SJU • Non-stop
Cheapest non-stop
$294
Typical prices: $351-$589
Frontier
Fri 11/23Fri 11/30
IAD - SJU • Non-stop
Nonstop flights
You can fly direct with United Airlines and Frontier. Average duration is 3h 53m
Direct flights
+1
Direct flights
+1
Avoid delays
Most punctual • 81% on-time
Best time • Fewest delays
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 7% compared to booking last minute.
Insights
Insights
When to travel
Cheapest • 28% price drop
Most popular
Good to know
+1
Good to know
+1
Top layover airports
Cheapest • Avg $299 (round-trip)
Shortest trip • 6h 52m (one-way)
Insights
Insights
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We hope you love your trip to San Juan Luis Munoz Marin Intl Airport!
Flight Deals
Booking Insights
Expert advice
Flight Deals

Cheap Flights from Dulles Intl to San Juan (IAD-SJU)

 
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Dulles Intl to San Juan

Mon, Nov 30 - Sun, Dec 6
Multiple Airlines Logo
10:11 am - 2:58 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
3h 47mnonstop
Multiple Airlines Logo
5:13 pm - 2:32 pmSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
22h 19m1 stop Jacksonville
$293Multiple Airlines
Wed, Sep 23 - Sat, Sep 26
Frontier Logo
6:13 pm - 1:34 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
19h 21m1 stop Fort Lauderdale
Frontier Logo
10:30 am - 8:09 pmSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
9h 39m1 stop Fort Lauderdale
$294Frontier
Sun, Oct 25 - Sat, Oct 31
Frontier Logo
7:50 am - 4:06 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
8h 16m1 stop Atlanta Hartsfield-Jackson
Frontier Logo
2:58 pm - 11:43 pmSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
8h 45m1 stop Atlanta Hartsfield-Jackson
$294Frontier
Wed, Nov 11 - Fri, Nov 13
Multiple Airlines Logo
6:07 pm - 1:25 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
18h 18m1 stop Fort Lauderdale
Multiple Airlines Logo
7:23 am - 5:56 pmSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
11h 33m2 stops Orlando Blountville Tri Cities TN/VA
$295Multiple Airlines
Sun, Nov 15 - Fri, Nov 20
United Airlines Logo
8:22 am - 1:15 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
3h 53mnonstop
United Airlines Logo
8:05 am - 11:09 amSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
4h 04mnonstop
$297United Airlines
Sat, Nov 14 - Fri, Nov 20
United Airlines Logo
5:29 pm - 10:22 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
3h 53mnonstop
United Airlines Logo
5:50 pm - 8:56 pmSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
4h 06mnonstop
$297United Airlines
Tue, Feb 16 - Tue, Mar 9
American Airlines Logo
9:15 am - 5:53 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
7h 38m1 stop Charlotte Douglas
American Airlines Logo
6:43 pm - 8:48 amSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
15h 05m1 stop Charlotte Douglas
$304American Airlines
Mon, Oct 26 - Fri, Oct 30
American Airlines Logo
6:15 am - 3:01 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
8h 46m1 stop Charlotte Douglas
American Airlines Logo
6:00 am - 11:23 pmSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
17h 23m1 stop Dallas/Fort Worth
$304American Airlines
Sat, Sep 12 - Sat, Sep 19
Delta Logo
3:15 pm - 10:19 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
7h 04m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:56 pm - 8:14 pmSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
7h 18m1 stop Atlanta Hartsfield-Jackson
$316Delta
Sun, Nov 1 - Thu, Nov 5
Delta Logo
8:13 am - 5:49 pmIAD  Washington, D.C. Dulles Intl-SJU San Juan Luis Munoz Marin Intl
8h 36m1 stop Atlanta Hartsfield-Jackson
Delta Logo
3:59 pm - 12:42 amSJU  San Juan Luis Munoz Marin Intl-IAD Washington, D.C. Dulles Intl
9h 43m1 stop Atlanta Hartsfield-Jackson
$346Delta
Booking Insights

Price, demand and travel trends for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights

Use KAYAK data on prices, travel dates, airlines and seasonal trends to compare options and book flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport with more confidence.

What's the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

Monday is the cheapest day of the week to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, it is 14% cheaper than the average day. Wednesday is the most expensive day with flight prices 7% higher than average. Based on deals found by KAYAK users in the last 12 months.

What is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

  • February is the cheapest month to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport at $327 round-trip.
  • July ($525) and June ($522) are the most expensive months.
  • The price difference between flying in the cheapest and most expensive months is 60% on average.
This is based on KAYAK aggregated and averaged internal data over the past 12 months.

When are prices from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport the cheapest?

Flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport are cheapest 5 weeks before departure. Booking in this window typically costs about 7% less than the average last-minute fare (within 2 weeks of the flight), based on KAYAK data.

Expert advice

Expert advice for your flight from Dulles Intl to San Juan

 
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.

Key details for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights

Low season

September

Cheapest flight

$136
Best time to beat the crowds with an average 11% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport

When to book flights from Dulles Intl to San Juan

Are your dates flexible? Find out the best times to travel from Dulles Intl to San Juan based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price

Your Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flight questions, answered

Find helpful route details based on KAYAK data, including flight times, airports, airlines and booking questions.

  • Which airlines offer extra legroom and free seat selection on Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights?

    Among airlines operating Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights:

    • United Airlines: offers extra legroom; offers free seat selection
    • Frontier: offers free seat selection

    Extra legroom and free seat selection availability depends on fare class and route.

  • What airlines are available from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    2 airlines operate flights between Washington, D.C. Dulles Intl Airport and San Juan Luis Munoz Marin Intl Airport. The airlines offering nonstop flights on this route include:

    • United Airlines
    • Frontier

  • Which airports can I use when flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport usually depart from Washington, D.C. Dulles Intl (IAD) and arrive at San Juan Luis Munoz Marin Intl (SJU).

  • Which airlines include bags at no extra cost on Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights?

    Here are some options for this route, based on selected ticket types and cabin classes:

    • United Airlines: a cabin bag and a checked bag in Economy Class
    • Frontier: a cabin bag and a checked bag in Economy Class
    • JetBlue: a cabin bag in Economy Class class

    Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

  • What cabin classes can I book on flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Two cabin classes are available on flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport:

    • Economy Class
    • First Class

  • How much can I save by taking a layover when flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    On this route, layover flights are cheaper than nonstop options on average. Layover fares average $299 round-trip via Miami (MIA), compared to $468 for nonstop.

  • What is the standard checked-bag allowance on flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $40–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

  • Which aircraft model is used most often on flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    The Boeing 737 MAX 8 family is used most often on this route, operated mainly by United Airlines and Southwest. Other aircraft seen on the route include Boeing 737 MAX 9 variants.

  • Which airports do connecting flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport pass through?

    One-stop flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport most commonly connect through:

    • Atlanta Hartsfield-Jackson (ATL) - 36% of one-stop connections
    • Orlando (MCO) - 32% of one-stop connections
    • Charlotte Douglas (CLT) - 26% of one-stop connections
    • Fort Lauderdale (FLL) - 2% of one-stop connections

    Atlanta Hartsfield-Jackson (ATL) handles the largest share of one-stop connections on this route.

  • Can I save money by using flexible dates for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Yes. Being flexible with your travel dates can save you up to 20% on the Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport route. Monday is the cheapest departure day at $392 round-trip on average, while Wednesday is the most expensive at $489, a difference of $97. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

  • At what point is a flight considered delayed from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    A flight is considered delayed when it departs 15 minutes or more after its scheduled time. This is the standard used by the US Department of Transportation and most airline industry reporting. On the Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport route, 21% of flights were delayed in the past 3 months, with delays averaging 2 hours 7 minutes.

  • How are flight departures from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport spread across the day?

    Morning is the busiest departure period on Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights, with 100% of flights leaving in that window. Afternoon departures account for 0%, evening flights for 0%, and night flights for 0%.

  • What popular places can I visit in San Juan Luis Munoz Marin Intl Airport?

    Some of the most popular sights in San Juan Luis Munoz Marin Intl Airport are Viejo San Juan, Condado Beach and Puerto Rico Convention Center. These are among the most viewed places in San Juan Luis Munoz Marin Intl Airport on KAYAK.

  • What are the earliest and latest flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    These are the earliest and latest flight times available from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport:

    • Earliest: departs at 8:22 am and lands at 12:15 pm
    • Latest: departs at 5:29 pm and lands at 9:22 pm.

    The flight takes about 3h 53m.

  • How expensive are last-minute Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights?

    Last-minute fares on this route - booked within 2 weeks of departure - run 6% below the route average of $453. Booking late can sometimes save money on this route, but inventory is limited.

  • How long is a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    A nonstop flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport takes 3h 53m, covering 1,573 miles.

  • Do I need a passport to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Yes, a valid passport is required for this international route. Many destinations require at least six months of validity beyond your travel dates. Check your passport expiry well before booking.

  • Have flight prices from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport changed much recently?

    Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $293 to $1,829. That means the highest observed fare was about 6x higher than the lowest one.

  • How are flight prices from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport looking right now?

    One-way fares from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport are currently lower than usual. Average one-way flight prices are about $154, which is 30% below the typical average for this route.

  • How do delay rates compare for morning and evening flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Morning flights have the fewest delays on this route. Delays tend to pile up throughout the day as one late flight pushes the next, so earlier departures are usually more reliable.

  • How much time can I save by choosing a different layover airport from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?

    Flying via Newark (EWR) gives the shortest average 1-stop total travel time at 6h 52m, compared with 7h 21m via Charlotte Douglas (CLT) and 7h 30m via Atlanta Hartsfield-Jackson (ATL).

  • What car rental options are available at San Juan Luis Munoz Marin Intl Airport (SJU)?

    San Juan Luis Munoz Marin Intl Airport (SJU) hosts 5 major car rental companies, with daily rates starting from around $4 for economy cars. Top options include:
    · Routes Car & Truck Rentals
    · U-Save
    · Payless
    · Hertz
    · Europcar

  • How much should I expect to pay for a Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flight?

    Round-trip flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport range from $338 to $578, with an average of $453 over the past 12 months. Anything below $338 counts as a good deal.

  • Which airlines offer Wi-Fi on Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights?

    JetBlue is the only airline on the Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport route offering in-flight Wi-Fi. Pricing depends on fare class.

Your guide to booking Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights

Get tips on when to book, when to fly and what to know before your trip.
  • If your dates can be flexible, aim for a Monday departure instead of Wednesday. On this route, Monday flights average $392 - about $97 less than Wednesday (20% savings) based on the last 12 months.
  • For the best chance at a low fare, aim to book around 5 weeks before you fly. On this route, that window historically saves about 7% versus last-minute pricing (KAYAK booking data, last 12 months).
  • If you can choose when to travel, plan your Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport trip for February. Fares historically average $327 round-trip in that month - typically $198 less than the most expensive month, which is July (based on the last 12 months).
  • If arriving on time is high on your priority list, United Airlines is the strongest pick on this route. 81% of United Airlines flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport arrived on time in the past 3 months, slightly above the route's average on-time arrival rate of 79%. When flights on this route do arrive late, the average delay is 2 hours 7 minutes, so choosing a carrier with strong on-time performance can make a difference on tight schedules.
  • If you have the time, taking a 1-stop flight through Miami Airport (MIA) can be cheaper than flying direct. The cheapest layover option averages $299 round-trip on this route - about $169 less than direct flights (based on the last 12 months).
  • If you're arriving late at night and need somewhere to stay, check out these hotels close to San Juan Luis Munoz Marin Intl Airport.
    - Coral by The Sea Hotel
    - Hampton Inn & Suites by Hilton San Juan
    - Palmar Sur

Prefer to fly direct from Washington Dulles Airport to San Juan?

 
Find which airlines fly direct from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, which days they fly and book direct flights.

Direct departures

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

Direct returns

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

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

Information on your arrival and departure airports