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Cheap Flights from Washington Dulles to San Juan

Compare Washington Dulles to San Juan flight deals

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

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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 R 4,218. Find the lowest prices on one-way and return tickets right here.
San Juan.R 1,853 per passenger.Departing Wed, 8 Jul.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 8 Jul, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 1,853, select.
San Juan.R 1,944 per passenger.Departing Wed, 12 Aug.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 12 Aug, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 1,944, select.
San Juan.R 1,957 per passenger.Departing Wed, 10 Jun.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Wed, 10 Jun, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 1,957, select.
San Juan.R 1,962 per passenger.Departing Tue, 1 Sep.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 1 Sep, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 1,962, select.
San Juan.R 2,268 per passenger.Departing Sun, 25 Oct.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sun, 25 Oct, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,268, select.
San Juan.R 2,274 per passenger.Departing Sun, 15 Nov.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Sun, 15 Nov, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,274, select.
San Juan.R 2,531 per passenger.Departing Tue, 26 May.One-way flight with Frontier Airlines.Outbound indirect flight with Frontier Airlines, departs from Washington Dulles on Tue, 26 May, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,531, select.
San Juan.R 2,625 per passenger.Departing Sun, 19 Jul.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Sun, 19 Jul, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,625, select.
San Juan.R 2,974 per passenger.Departing Wed, 16 Sep.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 16 Sep, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,974, select.
San Juan.R 2,974 per passenger.Departing Mon, 8 Jun.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 8 Jun, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,974, select.
San Juan.R 2,974 per passenger.Departing Wed, 5 Aug.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Wed, 5 Aug, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,974, select.
San Juan.R 2,986 per passenger.Departing Mon, 15 Mar.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Mon, 15 Mar, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 2,986, select.
San Juan.R 3,073 per passenger.Departing Sun, 15 Nov.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Sun, 15 Nov, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 3,073, select.
San Juan.R 3,073 per passenger.Departing Tue, 1 Dec.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Tue, 1 Dec, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 3,073, select.
San Juan.R 3,074 per passenger.Departing Sun, 21 Feb.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Sun, 21 Feb, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 3,074, select.
San Juan.R 3,075 per passenger.Departing Sun, 4 Oct.One-way flight with United.Outbound direct flight with United departs from Washington Dulles on Sun, 4 Oct, arriving in San Juan Luis Munoz Marin.Price includes taxes and charges.From R 3,075, select.

Find the cheapest month to fly from Washington Dulles to San Juan

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 July.
May
from R 2,531
Jun
from R 1,957
Jul
from R 1,853
Aug
from R 1,944
Sep
from R 1,962
Oct
from R 2,268
Nov
from R 2,274
Dec
from R 3,073
Jan
from R 3,075
Feb
from R 3,074
Mar
from R 2,986
Apr
Find prices

Direct flights from Washington Dulles to San Juan

Alternative Washington Dulles to San Juan routes

Looking for the cheapest, fastest or easiest route from Washington Dulles to San Juan? You could fly into the following airports instead.

San Juan Isla Grande

1km from central San Juan
Closest
Search flights

San Juan Luis Munoz Marin

11km from central San Juan
Cheapest
from R 1,853
Search flights

Roosevelt Roads

55km from central San Juan
Search flights

Ponce

70km from central San Juan
from R 3,034
Search flights

Vieques

82km from central San Juan
from R 5,300
Search flights

Culebra

85km from central San Juan
Search flights

Washington D.C. to San Juan: Flight information

The things to know before you go.
Cheapest flight foundR 1,853
Cheapest month to flyJuly
Average flight time3 hrs, 54 mins
Most popular airlineAir Canada
Average flights per week105

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 R 3,392. 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 54 minutes is the average flight time from Washington Dulles to San Juan.
Air Canada, United and Brussels Airlines fly direct from Washington Dulles to San Juan.
As of May 2026, there are 35 flights per week flying from Washington Dulles to San Juan.
The cheapest month to fly from Washington Dulles to San Juan is usually May.
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 R 3,392.
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 Sunday, 31 May 2026.
Yes – the average flight time is 3 hours and 54 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 May, the average temperature is usually around 27°C. August is typically the warmest month in San Juan, when it usually averages around 29°C. You can expect the least rain in February. The coldest month is January, with temperatures averaging 23°C. The rainiest month is September.
Currently, Frontier Airlines and United offer the cheapest flight tickets to San Juan.

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

  • The average time for a direct flight from Washington Dulles International Airport to San Juan is 4 hours.

  • San Juan and Washington DC (where Washington Dulles International Airport is located) share the UTC-4 timezone. That means there's no time difference to consider.

  • The busiest route is from Washington Dulles International Airport (IAD) to Luis Munoz Marin International Airport (SJU). Choose from ten services every week between these two airports. United Airlines offers a 08:30 departure between IAD and SJU.

  • To avoid rushing for your IAD to San Juan flight, leave enough time for things like check-in and baggage drop. Arriving two hours ahead of international departures and one hour before domestic flights is the general rule.

  • Travelling during a peak time like school or public holidays? Expect longer lines at check-in and security. To play it safe, arrive up to four hours before international flights and two hours before domestic departures.

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

  • United Airlines is a well-known airline that offers direct flights from Washington Dulles International Airport to San Juan.

  • We make it easy to book flight tickets from IAD to San Juan with a stopover. To see all your options, deselect 'Direct flights only.' Next, choose a flight that has a stop long enough to explore your chosen city. Popular stopovers include:

    • Orlando International Airport (MCO)

    • Raleigh-Durham International Airport (RDU)

    • Cyril E. King Airport (STT)

  • IAD is about 40 kilometres from central Washington DC. If you're driving, catching a cab or ride-sharing from the centre, it'll take you 50 minutes or so to get there, depending on traffic. If you're taking public transport, expect the journey time to be around 1 hour 10 minutes.

  • Catching an early flight from Washington Dulles International Airport to San Juan? Avoid rushing to the terminal (and get some extra shut-eye) by choosing one of these stays close to IAD:

  • Of all flights departing from Washington Dulles International Airport, 74.39% arrive on time at their destination.

  • You'll find IAD at 1 Saarinen Circle.

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

  • R 1,853 is the cheapest price we've found for a one-way Washington Dulles International Airport to San Juan flight. A return ticket right now is R 3,392. Depending on when you want to go and the availability, these fares could change.

  • Get cheap flights from IAD to San Juan by booking four months ahead. According to our research, that's the sweet spot for finding a bargain.

  • The best month for finding cheap Washington Dulles International Airport to San Juan tickets is August. Use the 'Whole month' tool to compare flight prices, then choose the dates offering the lowest fares.

  • Picking up a cheap flight from IAD to San Juan is easy with Price Alerts. All you need to do is create one of these automatic notifications and we'll get in touch as soon as the price has dropped.

  • Select your preferred arrival and departure times, number of stops and airlines with our filters. Then, sort the results for your flight from Washington Dulles International Airport to San Juan by 'Cheapest,' 'Fastest' 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 8 kilometres. It'll take you about 10 minutes to reach the centre driving.

  • Travelling on public transport takes around 55 minutes.

  • Consider staying in 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 accommodation options and skip the long transfer:

  • Explore without limits with a Luis Munoz Marin International Airport rental car. Pick up a set of wheels from Sixt, Ace Rent a Car or U-Save and discover more of San Juan and beyond.

  • Lock in the best possible rate by reserving your vehicle from Luis Munoz Marin International Airport about two weeks in advance of your flight from IAD to San Juan.

Fernando Luis Ribas Dominicci Airport (SIG)

  • Central San Juan is located around 8 kilometres from Fernando Luis Ribas Dominicci Airport (SIG). Once your flight from Washington Dulles International Airport to San Juan has landed and you've navigated your way to arrivals, the drive should take about 15 minutes.

  • If you choose to travel on public transport, you'll reach the centre in 1 hour or so.

  • You'll find some great places to call home for the night near SIG. Tuck yourself in and get cosy after your IAD to San Juan flight at any of these perfectly located options:

Best time to go to San Juan

  • Before locking in your flights from Washington Dulles International Airport to San Juan, consider which time of year is best for you. High season in San Juan offers a lively atmosphere and plenty of things to do, while the off-season brings better deals on hotels and fewer crowds.

  • Lock in a Washington Dulles International Airport to San Juan flight ticket with a departure in September if you're eager to experience the city during its warmest month. Expect temperatures to range from 23ºC (73ºF) to 33ºC (91ºF).

  • Search for cheap tickets from IAD to San Juan in February if you'd rather travel when it's cooler. Temperatures are at their lowest then, ranging between 20ºC (68ºF) and 28ºC (82ºF) on average.

More about San Juan

  • When it comes to searching for somewhere to rest your head, you'll find the top stays in San Juan right here. Browse these hotels once you've booked your flight from Washington Dulles International Airport to San Juan:

  • There are so many things to do and see in this city it can be tricky to know where to begin. La Garita del morro de san juan bahia, Castillo San Felipe del Morro and Fortaleza Street are leading attractions which should feature on any good San Juan itinerary.

Explore more of Puerto Rico

  • Aguadilla is just one of the many places in Puerto Rico waiting to be explored once you've seen the sights of San Juan. Around 113 kilometres away to the west, its best attractions include El Parterre, Aguadilla Ice Skating Arena and Bandera de los Reyes Magos.

  • Around 105 kilometres west of San Juan, Isabela is another essential stop in Puerto Rico. Start your sightseeing at Amarillo Mango, Urb. Llanos Piscina Park and Noches de Artesania.

Plan the rest of your trip from Washington D.C. to San Juan

Prices shown on this page are estimated lowest prices only. Found in the last 45 days.