
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $291 (American Airlines) |
One-way from | $131 (Trip.com) |
Popular in | March |
Cheapest in | October |
Average price | $443 |
Good round-trip deal | $421 or less |
Good one-way deal | $194 or less |
Fly from
Fly to
Route
Depart
Return
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Fri 8/28
9:00 am-12:54 pm
Nonstop3h 54m
San Juan Luis Munoz Marin Intl
Mon 8/31
2:20 pm-11:55 pm
1 stop9h 35m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Sat 8/29
8:40 am-12:34 pm
Nonstop3h 54m
San Juan Luis Munoz Marin Intl
Tue 9/1
3:56 pm-12:44 am
1 stop8h 48m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Mon 9/7
9:00 am-12:54 pm
Nonstop3h 54m
San Juan Luis Munoz Marin Intl
Sat 9/12
1:25 pm-10:59 pm
1 stop9h 34m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Wed 7/22
6:33 am-1:45 pm
1 stop7h 12m
San Juan Luis Munoz Marin Intl
Mon 7/27
7:20 am-11:21 am
Nonstop4h 01m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Fri 11/13
12:30 pm-11:55 pm
1 stop10h 25m
San Juan Luis Munoz Marin Intl
Mon 11/16
7:15 am-4:17 pm
1 stop10h 02m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Sun 11/15
6:05 am-3:40 pm
1 stop8h 35m
San Juan Luis Munoz Marin Intl
Mon 11/23
8:05 am-11:09 am
Nonstop4h 04m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Mon 7/20
5:24 pm-9:24 pm
Nonstop4h 00m
San Juan Luis Munoz Marin Intl
Thu 7/30
1:00 am-7:22 am
1 stop6h 22m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Thu 10/15
8:40 am-12:34 pm
Nonstop3h 54m
San Juan Luis Munoz Marin Intl
Wed 10/21
4:55 pm-8:47 pm
Nonstop3h 52m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Tue 8/11
9:00 am-12:54 pm
Nonstop3h 54m
San Juan Luis Munoz Marin Intl
Thu 8/20
4:55 pm-8:47 pm
Nonstop3h 52m
Washington, D.C.San Juan
IAD - SJU
IADSJU
Washington, D.C. Dulles Intl
Fri 7/31
6:33 am-1:45 pm
1 stop7h 12m
San Juan Luis Munoz Marin Intl
Sun 8/2
7:20 am-11:21 am
Nonstop4h 01m
| Provider | Price Accuracy | Trust Score* |
|---|---|---|
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy3 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*3 stars | |
| Price Accuracy2 stars | Trust Score*1 star | |
| Price Accuracy1 star | Trust Score*3 stars | |
| Price Accuracy- | Trust Score*3 stars | |
| Price Accuracy2 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 56 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, October 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 $303). Flying from Washington, D.C. Dulles Intl Airport to San Juan Luis Munoz Marin Intl Airport in March is currently the most expensive (average of $492). 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 43% on the flight price compared to flying in the afternoon, which is usually more expensive.
About 20% of weekly flights between Washington, D.C. and San Juan have experienced delays in the past year, with the average delay time being 125 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 Sunday 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 17% of flights being delayed.
Overall
Food
Entertainment
Comfort
Boarding
Crew
Reviews
Anonymous,May 2026
SEA - KOA
Overall
Food
Entertainment
Comfort
Boarding
Crew
Reviews
Anonymous,May 2026
SEA - KOA
Overall
Food
Entertainment
Comfort
Boarding
Crew
Reviews
Anonymous,May 2026
SEA - KOA
Overall
Food
Entertainment
Comfort
Boarding
Crew
Reviews
Anonymous,May 2026
SEA - KOA
Overall
Food
Entertainment
Comfort
Boarding
Crew
Reviews
Anonymous,May 2026
SEA - KOA
Overall
Food
Entertainment
Comfort
Boarding
Crew
Reviews
Anonymous,May 2026
SEA - KOA
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$91 | Average$301 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$136 | Average$323 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$161 | Average$462 | FlexibilityNo cancel fee | On-time62% | |
| Cheapest$225 | Average$438 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$257 | Average$484 | FlexibilityNo cancel fee | On-time69% |