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

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      Travellers and cabin class, 1 Adult, Economy
      Air Canada
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      Compare Washington Dulles to San Juan Luis Munoz Marin flight deals

      Find the cheapest month or even day of the year to fly to San Juan Luis Munoz Marin

      Book the best San Juan Luis Munoz Marin fare with no extra fees

      Flight deals from Washington Dulles to San Juan Luis Munoz Marin

      Looking for a cheap last-minute deal or the best return flight from Washington Dulles Airport to San Juan Luis Munoz Marin Airport? If you want to travel next month, return fares start from $261. Find the lowest prices on one-way and return tickets right here.
      San Juan.$248 per passenger.Departing Wed, 28 Oct, returning Wed, 4 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 28 Oct, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Wed, 4 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $248, select.
      San Juan.$261 per passenger.Departing Sat, 24 Oct, returning Tue, 27 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sat, 24 Oct, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Tue, 27 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $261, select.
      San Juan.$269 per passenger.Departing Sat, 7 Nov, returning Tue, 10 Nov.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sat, 7 Nov, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Tue, 10 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $269, select.
      San Juan.$299 per passenger.Departing Tue, 1 Dec, returning Tue, 8 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 1 Dec, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Tue, 8 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $299, select.
      San Juan.$320 per passenger.Departing Mon, 23 Nov, returning Wed, 2 Dec.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Mon, 23 Nov, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Wed, 2 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $320, select.
      San Juan.$387 per passenger.Departing Sun, 22 Nov, returning Tue, 24 Nov.Return flight with Frontier Airlines.Outbound direct flight with Frontier Airlines departs from Washington Dulles on Sun, 22 Nov, arriving in San Juan Luis Munoz Marin.Inbound direct flight with Frontier Airlines departs from San Juan Luis Munoz Marin on Tue, 24 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $387, select.
      San Juan.$411 per passenger.Departing Tue, 29 Sep, returning Thu, 15 Oct.Return flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 29 Sep, arriving in San Juan Luis Munoz Marin.Inbound indirect flight with Frontier Airlines, departs from San Juan Luis Munoz Marin on Thu, 15 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $411, select.
      San Juan.$426 per passenger.Departing Wed, 2 Dec, returning Fri, 18 Dec.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 2 Dec, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Fri, 18 Dec, arriving in Washington Dulles.Price includes taxes and charges.From $426, select.
      San Juan.$456 per passenger.Departing Sun, 3 Jan, returning Thu, 14 Jan.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sun, 3 Jan, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Thu, 14 Jan, arriving in Washington Dulles.Price includes taxes and charges.From $456, select.
      San Juan.$465 per passenger.Departing Sat, 17 Oct, returning Sat, 17 Oct.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 17 Oct, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Sat, 17 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $465, select.
      San Juan.$468 per passenger.Departing Tue, 2 Mar, returning Wed, 10 Mar.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Tue, 2 Mar, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Wed, 10 Mar, arriving in Washington Dulles.Price includes taxes and charges.From $468, select.
      San Juan.$468 per passenger.Departing Sat, 15 May, returning Fri, 21 May.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sat, 15 May, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Fri, 21 May, arriving in Washington Dulles.Price includes taxes and charges.From $468, select.
      San Juan.$469 per passenger.Departing Sun, 7 Feb, returning Fri, 12 Feb.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Sun, 7 Feb, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Fri, 12 Feb, arriving in Washington Dulles.Price includes taxes and charges.From $469, select.
      San Juan.$469 per passenger.Departing Thu, 29 Oct, returning Wed, 4 Nov.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Thu, 29 Oct, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Wed, 4 Nov, arriving in Washington Dulles.Price includes taxes and charges.From $469, select.
      San Juan.$469 per passenger.Departing Wed, 30 Sep, returning Tue, 6 Oct.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 30 Sep, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Tue, 6 Oct, arriving in Washington Dulles.Price includes taxes and charges.From $469, select.
      San Juan.$469 per passenger.Departing Mon, 25 Jan, returning Wed, 3 Feb.Return flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 25 Jan, arriving in San Juan Luis Munoz Marin.Inbound direct flight with United departs from San Juan Luis Munoz Marin on Wed, 3 Feb, arriving in Washington Dulles.Price includes taxes and charges.From $469, select.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from Washington Dulles to San Juan Luis Munoz Marin found in the last 4 days, and are subject to change and availability.

      Find the cheapest month to fly from Washington Dulles to San Juan Luis Munoz Marin

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Washington Dulles to San Juan Luis Munoz Marin flights are currently cheapest in October.
      Sep
      from $490
      Oct
      from $261
      Nov
      from $269
      Dec
      from $299
      Jan
      from $456
      Feb
      from $469
      Mar
      from $468
      Apr
      from $482
      May
      from $468
      Jun
      from $520
      Jul
      from $645
      Aug
      Find prices

      Direct flights from Washington Dulles to San Juan Luis Munoz Marin

      Air Canada
      Brussels Airlines
      Frontier Airlines
      United

      Washington Dulles to San Juan Luis Munoz Marin: Alternative routes

      Compare routes from Washington Dulles to San Juan below. You may find an airport to fly into that's cheaper, faster, or easier than San Juan Luis Munoz Marin.

      San Juan Isla Grande

      1km from central San Juan
      Closest
      Search flights

      San Juan Luis Munoz Marin

      11km from central San Juan
      Cheapest
      from $248
      Search flights

      Roosevelt Roads

      55km from central San Juan
      Search flights

      Ponce

      70km from central San Juan
      from $815
      Search flights

      Vieques

      82km from central San Juan
      from $2,722
      Search flights

      Culebra

      85km from central San Juan
      from $2,405
      Search flights

      Washington D.C. to San Juan: Flight information

      The things to know before you go.
      Cheapest flight found$248
      Cheapest month to flyOctober
      Average flight time3 hrs, 53 mins
      Most popular airlineAir Canada
      Average flights per week37

      Finding cheap flights from Washington Dulles to San Juan Luis Munoz Marin: Frequently asked questions

      The best price we found for a return flight from Washington Dulles to San Juan Luis Munoz Marin is $248. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      3 hours and 53 minutes is the average flight time from Washington Dulles to San Juan Luis Munoz Marin.
      Air Canada, United and Brussels Airlines fly direct from Washington Dulles to San Juan Luis Munoz Marin.
      As of September 2026, there are 37 flights per week flying from Washington Dulles to San Juan Luis Munoz Marin.
      The cheapest month to fly from Washington Dulles to San Juan Luis Munoz Marin is usually October.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to San Juan Luis Munoz Marin Airport on Wednesday, 28 October 2026.
      Yes – the average flight time is 3 hours and 53 minutes.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to San Juan Luis Munoz Marin but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to San Juan is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Frontier Airlines offers the cheapest flight tickets to San Juan Luis Munoz Marin.

      Travelling from Washington Dulles Airport (IAD) to San Juan Luis Munoz Marin Airport (SJU): what you need to know

      • Jump on a direct flight from Washington Dulles Airport to San Juan Luis Munoz Marin Airport and you'll be travelling for an average of 4 hours.

      • The timezone in San Juan is UTC-4, which is one hour ahead of Washington DC.

      • You can choose from 13 weekly Washington Dulles Airport to San Juan Luis Munoz Marin Airport flights. The 08:30 departure with United Airlines is the earliest you can take. United Airlines operates the latest service of the day at 17:35.

      • For a smooth journey, turn up at the airport two hours ahead of international flights and an hour before domestic departures. This way, you can comfortably board your IAD to SJU flight.

      • Travelling during a peak time like July? Major public holidays and other popular periods can result in longer lines and delays at airport checkpoints. Be extra cautious and get there up to four hours ahead of an international flight and two hours before a domestic departure.

      • United is your gateway to exploring San Juan (and perhaps some other exciting corners of Puerto Rico!). Check out the direct flights from Washington Dulles Airport to San Juan Luis Munoz Marin Airport offered by this popular airline.

      • United is the top choice for travellers on this route.

      • With 72.97% of services arriving as scheduled, United is the most punctual carrier offering IAD to SJU flights.

      • If you want to explore another city along the way, simply deselect 'Direct flights only' when searching for your ticket from Washington Dulles Airport to San Juan Luis Munoz Marin Airport. These are the top stopovers between IAD and SJU:

        • Orlando International Airport

        • Raleigh / Durham Airport

        • Cyril E. King Airport

      How to find the cheapest flights from Washington Dulles Airport (IAD) to San Juan Luis Munoz Marin Airport (SJU)

      • Right now, $127 is the cheapest price we've seen for a one-way Washington Dulles Airport to San Juan Luis Munoz Marin Airport flight. The best price for a return plane ticket is $248. Remember that fares could change due to demand when booking.

      • Book three months before your departure date. After looking at the numbers on our calendar, this is how far you'll want to book ahead to secure cheap tickets from IAD to SJU.

      • The cheapest month for flights from Washington Dulles Airport to San Juan Luis Munoz Marin Airport is August. Use the 'Whole month' tool to see the lowest prices if you have flexible travel dates.

      • You don't need to check every day to see if fares have gone down when you create a Price Alert. We'll let you know as soon as there's a new deal on cheap flights from IAD to SJU.

      • Pick your ideal arrival and departure times, airlines and number of stops with the filters. Alternatively, sort your results by 'Cheapest' to find the best deals on flights from Washington Dulles Airport to San Juan Luis Munoz Marin Airport.

      Handy information about Washington Dulles Airport (IAD)

      • The address for IAD is 1 Saarinen Circle.

      • When it comes to the on-time performance of Washington Dulles Airport, data shows 77% of flights meet their scheduled arrival time.

      • Central Washington DC to Washington Dulles Airport is around 40 kilometres. Depending on traffic, it'll take about 45 minutes to get there if you're ride-sharing, catching a taxi or driving.

      • You can expect a journey time of about 1 hour 10 minutes on public transport.

      • Need a handy hotel close to IAD? If you've booked an early flight from Washington Dulles Airport to San Juan Luis Munoz Marin Airport, these accommodation options will have you sleeping moments from check-in:

      Arriving at San Juan Luis Munoz Marin Airport (SJU)

      • If you're coming in on a late Washington Dulles Airport to San Juan Luis Munoz Marin Airport flight, nothing beats the convenience of being close to the terminal. Collect your bags from the carousel and then be showered and sleeping shortly after at one of these hotels near SJU:

      • Travel at your own pace with a San Juan Luis Munoz Marin Airport rental car. Book your wheels from Sixt, Ace Rent a Car or U-Save and find adventure across San Juan and beyond.

      • Lock in the lowest price by booking your ride from San Juan Luis Munoz Marin Airport about two weeks ahead of your departure.

      When to fly to San Juan Luis Munoz Marin Airport (SJU)

      • July is the busiest month for flights from Washington Dulles Airport to San Juan Luis Munoz Marin Airport. To escape the crowds, head to San Juan in March.

      • When booking your flight from Washington Dulles Airport to San Juan Luis Munoz Marin Airport, consider the type of weather you like. August is the warmest month in San Juan, with temperatures ranging from 24ºC (75ºF) to 32ºC (90ºF).

      • Search for cheap tickets from IAD to SJU in February if you like travelling in cooler conditions. Temperatures are at their lowest around then, ranging between 21ºC (70ºF) and 28ºC (82ºF) on average.

      Explore more of Puerto Rico

      • You've done San Juan, now it's time to explore more of Puerto Rico. Travel about 10 kilometres west to Bayamon to check off its leading attractions. From Ron del Barrilito - Hacienda Santa Ana to Parque de las Ciencias and Parque Recreativo Río Bayamón, there's plenty to keep you busy.

      • If you're interested in discovering another major stop in Puerto Rico, head for Carolina, about 11 kilometres east of San Juan. Isla Verde Beach, Carolina Beach and Balneario Isla Verde are among its highlights.

      Plan smart, explore more

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      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.