Expect long security queues at IAD, especially in the afternoon. Plan extra time for check-in and security to avoid stress.
$113+ Cheap flights from Dulles Intl (IAD) to Luis Munoz Marin Intl (SJU)
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 12/31. Fares are subject to change and may not be available on all flights or dates of travel.
IAD — SJU
ene. 11 — ene. 181
1 adult, Economy
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Find cheap flights from Dulles Intl to Luis Munoz Marin Intl with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheapflights Tip: The best prices from Washington, D.C. Dulles Intl to San Juan Luis Munoz Marin Intl are usually found in June or October, booked 60 days in advance, depart on a Tuesday or Sunday and return on a Thursday
Cheap flight deals from Dulles Intl to Luis Munoz Marin Intl
Cheapest flights from Dulles Intl to Luis Munoz Marin IntlExplore the most affordable flight options available from Dulles Intl to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.
Explore the most affordable flight options available from Dulles Intl to Luis Munoz Marin Intl. Find the lowest fares from popular airlines and budget airlines, with prices last updated on diciembre 12, 2025.
This Priceline deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 12/299:58 pmIAD - SJU
1 stop27h 52mFrontier
vie. 1/163:11 pmSJU - IAD
Nonstop4h 08mFrontier
Deal found 12/9![Frontier logo]()
$185
This Kiwi.com deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/1410:38 amIAD - SJU
Nonstop3h 54mFrontier
dom. 12/214:18 pmSJU - IAD
Nonstop4h 13mFrontier
Deal found 12/11![Frontier logo]()
$193
This Super.com deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/1410:38 amIAD - SJU
Nonstop3h 54mFrontier
mar. 12/234:07 pmSJU - IAD
Nonstop4h 13mFrontier
Deal found 12/11![Frontier logo]()
$194
This Frontier deal was found by Cheapflights users on 12/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 12/1410:38 amIAD - SJU
Nonstop3h 54mFrontier
sáb. 12/204:18 pmSJU - IAD
Nonstop4h 13mFrontier
Deal found 12/11![Frontier logo]()
$195
This Super.com deal was found by Cheapflights users on 12/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Super.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/309:58 pmIAD - SJU
1 stop17h 01mFrontier
jue. 1/85:45 amSJU - IAD
1 stop8h 16mFrontier
Deal found 12/9![Frontier logo]()
$213
This Priceline deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/139:20 pmIAD - SJU
1 stop11h 35mFrontier
sáb. 12/204:18 pmSJU - IAD
Nonstop4h 13mFrontier
Deal found 12/10![Frontier logo]()
$218
This Frontier deal was found by Cheapflights users on 12/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
sáb. 12/139:20 pmIAD - SJU
1 stop11h 35mFrontier
dom. 12/214:18 pmSJU - IAD
Nonstop4h 13mFrontier
Deal found 12/10![Frontier logo]()
$220
Find flight deals from Dulles Intl to Luis Munoz Marin Intl
Discover tips and strategies to find the most affordable flight options for your journey from Dulles Intl (IAD) to Luis Munoz Marin Intl (SJU). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated diciembre 12, 2025.
Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $181 (CheapOair) |
One-way from | $113 (American Airlines) |
Popular in | April |
Cheapest in | June |
Average price | $516 |
Good round-trip deal | $271 or less |
Good one-way deal | $137 or less |
Cheapflights Fare Finder
Customize your flight search to find flights from Dulles Intl to Luis Munoz Marin Intl 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, Cheapflights users made 2,558,603 searches. Data last updated diciembre 12, 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
Dulles Intl
Fly to
Luis Munoz Marin Intl
Route
Depart
Return
Price
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
mar. 5/26
5:24 pm-9:24 pm
Nonstop4h 00m
San Juan Luis Munoz Marin Intl
lun. 6/1
1:05 am-7:19 am
1 stop6h 14m
$247
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
lun. 5/4
6:00 am-1:45 pm
1 stop7h 45m
San Juan Luis Munoz Marin Intl
vie. 5/8
1:00 am-7:19 am
1 stop6h 19m
$251
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
lun. 1/12
5:32 pm-10:22 pm
Nonstop3h 50m
San Juan Luis Munoz Marin Intl
vie. 1/16
8:10 am-11:15 am
Nonstop4h 05m
$262
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
mar. 2/24
5:32 pm-10:22 pm
Nonstop3h 50m
San Juan Luis Munoz Marin Intl
sáb. 2/28
8:10 am-11:15 am
Nonstop4h 05m
$303
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
mar. 5/12
6:20 am-2:44 pm
1 stop8h 24m
San Juan Luis Munoz Marin Intl
lun. 5/18
7:20 am-11:21 am
Nonstop4h 01m
$312
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
dom. 2/1
6:00 am-4:36 pm
1 stop9h 36m
San Juan Luis Munoz Marin Intl
lun. 2/9
8:10 am-11:15 am
Nonstop4h 05m
$325
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
mar. 4/14
10:20 am-8:34 pm
1 stop10h 14m
San Juan Luis Munoz Marin Intl
mar. 4/28
4:55 pm-8:56 pm
Nonstop4h 01m
$325
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
mar. 1/20
5:32 pm-10:22 pm
Nonstop3h 50m
San Juan Luis Munoz Marin Intl
jue. 1/22
5:50 pm-8:55 pm
Nonstop4h 05m
$332
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
mar. 4/14
6:00 am-1:45 pm
1 stop7h 45m
San Juan Luis Munoz Marin Intl
jue. 4/30
4:55 pm-8:56 pm
Nonstop4h 01m
$337
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
mié. 5/6
8:34 am-12:34 pm
Nonstop4h 00m
San Juan Luis Munoz Marin Intl
lun. 5/11
1:00 am-7:19 am
1 stop6h 19m
$337
Showing 1-10 of 22 results
Compare providers for flights from Dulles Intl to Luis Munoz Marin Intl
Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Dulles Intl to Luis Munoz Marin Intl in December.
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*1 star | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*2 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars |
- Most accurate provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Juan Luis Munoz Marin Intl Airport flights, users find the pricing of Mytrip to be most consistent on Cheapflights vs. Mytrip Users can find the same prices on Washington, D.C. Dulles Intl Airport-San Juan Luis Munoz Marin Intl Airport flight deals on Cheapflights vs. Mytrip >95% of the time. Price accuracy is based on data collected from Washington, D.C. Dulles Intl Airport-San Juan Luis Munoz Marin Intl Airport flight searches over the past month and is updated monthly.
- Most trusted provider: When it comes to deals on Washington, D.C. Dulles Intl Airport-San Juan Luis Munoz Marin Intl Airport flights, Cheapflights users trust Mytrip the most. Mytrip has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Washington, D.C. Dulles Intl Airport-San Juan Luis Munoz Marin Intl Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.
Best time to book a flight from Dulles Intl to Luis Munoz Marin Intl
Have a flexible travel schedule? Discover the best time to fly to Luis Munoz Marin Intl from Dulles Intl with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport
Prices
Airlines
Delays
More
How far ahead should I book a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Use this chart to determine the optimal time to book a round-trip flight from Dulles Intl to Luis Munoz Marin Intl. Price data was last updated on December 5, 2025.
The best time to book flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport is 57 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.
What is the cheapest month to book a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Currently, June is the cheapest month in which you can book a flight from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport (average of $86). Flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport in September is currently the most expensive (average of $272). 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?
Find hourly flight availability from Dulles Intl to Luis Munoz Marin Intl. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated diciembre 12, 2025.
It’s typically best to fly out from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport at noon. Doing so could potentially save you 46% on the flight price compared to flying in the evening, which is usually more expensive.
What is the cheapest day to fly from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Use this chart to determine the cheapest time to fly round-trip from Dulles Intl to Luis Munoz Marin Intl. Price data was last updated on December 6, 2025.
Travelers seeking maximum savings on their Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flight should consider departing on Wednesday at noon when fares are most often at their lowest. Saturday evenings flights should be avoided if possible as fares are typically the most expensive at this time.
How often are flights from Washington, D.C. to San Juan delayed?
About 19% of weekly flights between Washington, D.C. and San Juan have experienced delays in the past year, with the average delay time being 120 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 Thursday 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 16% of flights being delayed.
What’s the top layover airport for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Share of 1-stop round-trip flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport chosen by Cheapflights users in the past 12 months, using the same layover each way.
Orlando (MCO) – chosen by Cheapflights users on 67% of 1-stop itineraries from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport on Cheapflights.
What’s the cheapest layover airport for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Average round-trip fare for 1-stop flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, chosen by Cheapflights users in the past 12 months, with the same layover each way.
Orlando (MCO) is the most affordable 1-stop option, with an average round-trip price of $152.
What’s the fastest layover option from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Shortest average travel time for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, based on itineraries clicked by Cheapflights users over the past 12 months, grouped by layover airport.
Flights via Orlando (MCO) have the shortest average one-way travel time for 1-stop routes: 7h 51m.
Which airport typically offers the quickest layover for flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport?
Average layover duration for 1-stop one-way flights from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport, chosen by Cheapflights users in the last 12 months, grouped by stopover airport.
Flights via Tampa (TPA) offer the fastest connection on this route, with an average layover time of 4h 27m.
The best insider tips for Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport flights
AI-powered summary based on content written by travel experts. AI can make mistakes.
Cheapflights partnered with top experts to bring you the best recommendations for your Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport trip
Reviews of airlines servicing Luis Munoz Marin Intl
Get insights into the airlines that provide service to Luis Munoz Marin Intl. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Luis Munoz Marin Intl. Reviews last updated diciembre 12, 2025.
See what other customers who have flown with Delta, United Airlines, and American Airlines from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.3
Entertainment
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.3
Entertainment
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.3
Entertainment
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.3
Entertainment
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.3
Entertainment
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Boarding
8.1
Overall
7.9
Comfort
7.9
Crew
8.5
Food
7.3
Entertainment
7.9
Reviews
1 / 20
6.0
GoodJim,Nov 2025
AVL - ATL
Related info for your journey
Find useful and relevant information for your journey from Dulles Intl to Luis Munoz Marin Intl. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Traveling to a place near San Juan Luis Munoz Marin Intl Airport?
Book flights to San Juan Luis Munoz Marin Intl Airport if you plan to visit one of these locationsDorado
Fajardo
Rio Grande
Humacao
Luquillo
Bayamón
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Alternative routes for Dulles Intl to Luis Munoz Marin Intl
See prices for flight routes from nearby airports that may be better suited for you.
Top 6 airlines flying from Dulles Intl to Luis Munoz Marin Intl
Discover the top 6 airlines that operate flights from Dulles Intl to Luis Munoz Marin Intl. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated diciembre 12, 2025.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$108 | Average$279 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$145 | Average$489 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$148 | Average$345 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$151 | Average$287 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$161 | Average$386 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$269 | Average$493 | FlexibilityNo cancel fee | On-time69% |