Flight tickets from Washington Dulles to San Juan

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      United
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      Compare Washington Dulles to San Juan flight deals

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

      Book the best San Juan fare with no extra fees

      Flight deals from Washington Dulles to San Juan

      Looking for a cheap last-minute deal or the best return flight from Washington Dulles Airport to San Juan? If you want to travel next month, return fares start from ₹ 17,676. Find the lowest prices on one-way and return tickets right here.
      How did we find these deals? The deals you see here are the lowest prices for flight tickets from Washington Dulles to San Juan 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 from ₹ 7,951 one-way

      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 flights are currently cheapest in October.

      Direct flights from Washington Dulles to San Juan

      Air Canada
      Brussels Airlines
      Frontier Airlines
      United

      Washington D.C. to San Juan: Flight information

      The things to know before you go.
      Cheapest flight found₹ 7,979
      Cheapest month to flyOctober
      Average flight time3 hrs, 53 mins
      Most popular airlineUnited
      Average flights per week42

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

      There are 6 airports in San Juan: San Juan Isla Grande, San Juan Luis Munoz Marin, Roosevelt Roads, Ponce, Vieques, and Culebra.
      The best price we found for a return flight from Washington Dulles to San Juan is ₹ 17,676. 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.
      United, Air Canada and Brussels Airlines fly direct from Washington Dulles to San Juan.
      As of September 2026, there are 42 flights per week flying from Washington Dulles to San Juan.
      The cheapest month to fly from Washington Dulles to San Juan is usually October.
      If you're flying from Washington Dulles Airport, the cheapest airport near San Juan is San Juan Luis Munoz Marin – which is 11.3 km away from the centre of San Juan. We've found flights into this airport from ₹ 17,676.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Washington Dulles Airport to San Juan on Tuesday, 20 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 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.

      In September, the average temperature is usually around 28°C. August is typically the warmest month in San Juan, when it usually averages around 30°C. You can expect the least rain in January. The coldest month is February, with temperatures averaging 22°C. The rainiest month is September.
      Currently, Frontier Airlines offers the cheapest flight tickets to San Juan.

      Travelling from Washington Dulles International Airport (IAD) to San Juan: what you need to know

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

      • Washington Dulles International Airport is located in Washington DC. Based in the UTC-4 timezone, San Juan is one hour ahead of Washington DC.

      • The most popular route is from Washington Dulles International Airport (IAD) to Luis Munoz Marin International Airport (SJU). You can choose from 13 weekly services between these two airports. If you'd like to head off as soon as possible, the earliest flight from IAD to SJU is the 08:30 United Airlines option. If you'd rather fly out later on, the final departure is at 17:35 with United Airlines.

      • For a relaxed start to your IAD to San Juan flight, allow plenty of time to check in and find your gate. Arriving two hours before international departures and one hour before domestic flights is the general rule.

      • You'll likely experience longer lines during popular months like June. Arriving up to four hours ahead of international flights and two hours for domestic departures is a good idea.

      • You can book a direct Washington Dulles International Airport to San Juan ticket. Begin your journey at IAD and land at Luis Munoz Marin International Airport (SJU).

      • Book your seat with United Airlines. This airline operates direct flights from Washington Dulles International Airport to San Juan.

      • A stopover is the perfect opportunity to break up your trip and possibly even visit a new city. When browsing for plane tickets from IAD to San Juan, deselect the 'Direct flights only' box to see where you can visit along the way. Some popular options include:

        • Orlando International Airport (MCO)

        • Raleigh-Durham International Airport (RDU)

        • Cyril E. King International Airport (STT)

      • Located around 40 kilometres from central Washington DC, IAD can be reached in about 45 minutes by car (depending on traffic). Travelling on public transport takes roughly 1 hour 10 minutes.

      • Want an easy start to your holiday? Stay near IAD. Whether you're catching an early flight from Washington Dulles International Airport to San Juan or want to avoid feeling rushed, these hotels put convenience first:

      • Of the departures from Washington Dulles International Airport, 77% arrive on time at their destination.

      • IAD is located at 1 Saarinen Circle.

      How to find the cheapest flights from Washington Dulles International Airport (IAD) to San Juan

      • ₹ 7,979 is currently the best price for a one-way Washington Dulles International Airport to San Juan flight. A return plane ticket starts at ₹ 17,676. These prices can change depending on demand.

      • To score cheap flights from IAD to San Juan, book your trip three months before your planned departure.

      • Organise your trip for August. That's the best month for landing an incredible deal on Washington Dulles International Airport to San Juan tickets. If you're flexible with your travel dates, use the 'Whole month' tool to access the lowest price across every month.

      • Snapping up a cheap flight from IAD to San Juan couldn't be easier with Price Alerts. Simply create one of these automatic notifications and we'll let you know when a cheaper option becomes available.

      • Pick your preferred departure and arrival times, airlines and number of stops with our filters. Then, sort the results for your flight from Washington Dulles International Airport to San Juan by 'Fastest,' 'Cheapest' or 'Best.'

      Airports in San Juan

      Luis Munoz Marin International Airport (SJU)

      • The distance from Luis Munoz Marin International Airport (SJU) to central San Juan is roughly 11 kilometres. It takes about 20 minutes to get to the centre driving.

      • When travelling by public transport, expect a journey time of around 1 hour.

      • Consider booking a hotel near SJU if you're coming in on a late flight from Washington Dulles International Airport to San Juan. Check in to one of these options and make your first night all about catching up on rest:

      • Reserving your vehicle from Luis Munoz Marin International Airport around two weeks in advance of your flight from IAD to San Juan can help you secure the lowest rate.

      Best time to go to San Juan

      • It's time to pick your dates for your flight from Washington Dulles International Airport to San Juan. March is the busiest month to visit San Juan. If you like a more relaxed atmosphere, go in December.

      • Lock in a Washington Dulles International Airport to San Juan plane ticket with a departure in August to explore the city during its warmest month. Expect temperatures to range from 24ºC to 32ºC.

      • Search for cheap tickets from IAD to San Juan in February if you want to travel in cooler conditions. Temperatures are at their lowest then, ranging between 21ºC and 28ºC on average.

      More about San Juan

      • Start your San Juan trip off on the right foot by choosing the ideal place to stay. After booking your flight from Washington Dulles International Airport to San Juan, explore our range of accommodation options including:

      • Esperanza Beach and Balneario El Escambron are just the start of the leading attractions to put on your San Juan must-do list. Keep the sightseeing going at Escambron Green.

      Explore more of Puerto Rico

      • San Juan is easy to fall in love with, but there are so many other corners of Puerto Rico you'll want to see. Around 113 kilometres west of San Juan, a trip to Aguadilla will keep your itinerary busy. Start with leading attractions like Silla Aguadilla, Bridges Surf Beach and Playa Rompe Olas.

      • If there's time to check out another side of Puerto Rico, head for Isabela, roughly 105 kilometres west of San Juan. Playa montones, Shore Island Beach and Guajataca Forest Reserve are highlights.

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