Cheap Flights from Washington D.C. (WAS) to San Juan (SJU)

Frequently Asked Questions

• What are the cheapest flights from Washington D.C. to San Juan (WAS-SJU)?

  Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$36 on Cheapest nonstop routes (e.g. IAD to SJU on Sat, Mar 7), while Frontier Airlines offers Cheapest nonstop round-trips from US$116 departing on Mon, Mar 2 and returning on Fri, Mar 6.

• Which airlines offer direct flights from Washington D.C. to San Juan?

  At the moment, you can catch a nonstop flight from Washington D.C. to San Juan with the following airlines, including: United Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.

• How long is a flight from Washington D.C. to San Juan?

  It takes about 4 hours 6 minutes to fly from Washington D.C. to San Juan.

• When is the best time to book flights from Washington D.C. to San Juan?

  By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Washington D.C. to San Juan is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.

• How many flights are there per week from Washington D.C. to San Juan?

  Based on Trip.com data in the past 4 weeks, there is 23 flight per week flying from Washington D.C. to San Juan. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/T/W/T/F/S -- UA2021 (08:50)

• How can I find the best deals on flights from Washington D.C. to San Juan?

  To find best deals on flights from Washington D.C. to San Juan, you can use various tools on Trip.com:
  · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Sat, Mar 7, with one-way flights priced at just US$36.
  · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Frontier Airlines.
  · Set up price alerts to easily monitor ticket prices without having to check every day.
  · Check Trip.com flight deals and promo codes frequently.
  · Avoid peak season unless you book very early. It seems the peak season for San Juan travel is around January.
  · Get exclusive promo codes for Trip.com app users.

• When are flight tickets from Washington D.C. (WAS) to San Juan (SJU) the cheapest?

  The cheapest months to fly from Washington D.C. to San Juan is October, when demand for travel is lower.

• Which upcoming date is cheapest to fly from Washington D.C. to San Juan on?

  After crunching the numbers on our February flight calendar, it's currently cheapest to fly from Washington D.C. to San Juan on February 23, 2026 with Frontier Airlines, with prices starting at US$79.

• Which airports can I fly to for San Juan from Washington D.C.?

  You can land at any one of the following hubs in San Juan, with Dulles International Airport to Luis Munoz Marin International Airport (IAD-SJU) is by far the most common option on this route: Fernando Luis Ribas Dominicci Airport (SIG) Luis Munoz Marin International Airport (SJU).

• Is there any time difference between Washington D.C. and San Juan?

  The time difference between San Juan and Washington D.C. is 1h.

• How do I change or cancel my ticket from Washington D.C. to San Juan?

  Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.