Expect long security queues at IAD, especially in the afternoon. Plan extra time for check-in and security to avoid stress.

Most accurate provider | Mytrip 3 stars |
|---|---|
Most trusted provider | Mytrip 3 stars |
Round-trip from | $178 (Kiwi.com) |
One-way from | $103 (Kiwi.com) |
Popular in | April |
Cheapest in | June |
Average price | $516 |
Good round-trip deal | $293 or less |
Good one-way deal | $127 or less |
Fly from
Fly to
Route
Depart
Return
Price
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Sun 1/18
6:00 am-4:36 pm
1 stop9h 36m
San Juan Luis Munoz Marin Intl
Fri 1/23
5:50 pm-8:55 pm
Nonstop4h 05m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Tue 2/10
6:00 am-5:17 pm
1 stop10h 17m
San Juan Luis Munoz Marin Intl
Tue 2/24
6:15 am-2:45 pm
1 stop9h 30m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Sat 2/21
10:57 am-9:12 pm
1 stop9h 15m
San Juan Luis Munoz Marin Intl
Tue 2/24
6:15 am-2:45 pm
1 stop9h 30m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Wed 1/21
3:42 pm-11:45 pm
1 stop7h 03m
San Juan Luis Munoz Marin Intl
Thu 1/29
3:20 pm-11:06 pm
1 stop8h 46m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Tue 3/17
10:06 am-8:18 pm
1 stop10h 12m
San Juan Luis Munoz Marin Intl
Fri 3/20
6:15 am-2:39 pm
1 stop8h 24m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Tue 1/27
7:15 am-5:17 pm
1 stop9h 02m
San Juan Luis Munoz Marin Intl
Thu 2/5
6:27 pm-12:24 am
1 stop6h 57m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Mon 1/26
6:00 am-2:31 pm
1 stop7h 31m
San Juan Luis Munoz Marin Intl
Wed 2/4
2:15 pm-8:45 pm
1 stop7h 30m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Sat 1/24
5:32 pm-10:22 pm
Nonstop3h 50m
San Juan Luis Munoz Marin Intl
Thu 1/29
8:10 am-11:15 am
Nonstop4h 05m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Sat 1/24
1:05 pm-6:11 am
2 stops16h 06m
San Juan Luis Munoz Marin Intl
Fri 1/30
2:05 am-4:00 pm
2 stops14h 55m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Fri 1/23
6:03 am-4:36 pm
1 stop9h 33m
San Juan Luis Munoz Marin Intl
Tue 1/27
7:45 am-4:14 pm
1 stop9h 29m
| 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 |
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.
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.
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 44% on the flight price compared to flying in the afternoon, which is usually more expensive.
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. Friday mornings flights should be avoided if possible as fares are typically the most expensive at this time.
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.
Historically, flights departing in the morning are less likely to be delayed, whereas flights leaving in the evening tend to experience delays more often.
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.
Over the last year, United Airlines have had the lowest number of delays on this route, with just 16% of flights being delayed.
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.
Orlando (MCO) is the most affordable 1-stop option, with an average round-trip price of $152.
Flights via Orlando (MCO) have the shortest average one-way travel time for 1-stop routes: 7h 51m.
Flights via Tampa (TPA) offer the fastest connection on this route, with an average layover time of 4h 27m.
Entertainment
Crew
Overall
Comfort
Boarding
Food
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Boarding
Food
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Boarding
Food
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Boarding
Food
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Boarding
Food
Reviews
Jim,Nov 2025
AVL - ATL
Entertainment
Crew
Overall
Comfort
Boarding
Food
Reviews
Jim,Nov 2025
AVL - ATL
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$104 | Average$283 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$148 | Average$348 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$151 | Average$279 | FlexibilityNo cancel fee | On-time65% | |
| Cheapest$168 | Average$406 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$219 | Average$484 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$267 | Average$485 | FlexibilityNo cancel fee | On-time69% |