Cheap Flights from Washington (IAD) to San Juan (SIG)

Popular airlines from Washington Dulles Intl. Airport (IAD) to San Juan (SIG-Fernando Luis Ribas Dominicci)

Alternative airports near San Juan

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Luis Munoz Marin Intl. SJU. Cheapest option available. Average driving time to city center is 16 minutes. Flights from $320
SJU
Luis Munoz Marin Intl.
Cheapest
Average driving time to city center16 min
Flights from $320

Frequently asked questions

How much does a flight from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG) cost?
Snag a cheap one-way flight or cheap return flight from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight deals on this route.
What is the cheapest month to fly from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG)?
The cheapest month to fly from IAD to SIG is , when there's less demand. Off-peak months are typically when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG)?
Expedia's filter tool lets you easily compare airlines, flight times and fares all in one place. Choose your preferences, then sort by "Price (lowest to highest)" to find out which carrier offers the cheapest IAD to SIG flight.
How many flights per day from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG)?
Direct flights from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG) aren't available daily, so you'll need to take a flight with a layover. Explore your options with Expedia's filters. Enter your travel dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from IAD to SIG?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Keep in mind that flight schedules can vary based on various factors, including the airline and season.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG)?
To arrive at Fernando Luis Ribas Dominicci Airport (SIG) without delays, book a flight that leaves from Washington Dulles Intl. Airport (IAD) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG) last-minute?
Booking your ticket from IAD to SIG shortly before your getaway is generally more expensive. However, if there's some wiggle room with your schedule, you could land a cheap last-minute fare.
Can I cancel or change the date of my flight from Washington Dulles Intl. Airport (IAD) to Fernando Luis Ribas Dominicci Airport (SIG)?
It's generally possible to cancel or reschedule your IAD to SIG flight. However, for bookings made more than 24 hours ago, additional charges may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find more information on our Customer Service portal.

Travel information

Origin airport
Washington Dulles Intl.
Destination airport
Fernando Luis Ribas Dominicci
Distance
1570 mi

Book with confidence

Washington to San Juan Flights

The cheapest times to fly from Washington to San Juan

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Washington to San Juan are during the month of . You can find some of the cheapest flights from Washington to San Juan with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Washington to San Juan

Sunday is one of the best days to book for cheap flights from Washington to San Juan: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Washington to San Juan

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Washington to San Juan in 2025. You can also book with separate airlines for your outbound and return journeys, from one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Washington to San Juan flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Washington to San Juan airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Washington to San Juan Flights

Explore a world of travel with Expedia

*Available to One Key members.