Washington Dulles International Airport
Dulles, United StatesIAD / KIAD
International hub · 171 direct destinations · 4 runways · longest runway 11,499 ft
81 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Route
Dulles → San Juan
IAD
DullesWashington Dulles International Airport
DullesWashington Dulles International AirportSJU
San JuanLuis Munoz Marin International Airport
San JuanLuis Munoz Marin International Airport- Distance
- 1,575 mi
- Estimated flight time
- ~3h 40m
Same local time in Dulles and San Juan.
Observed nonstop
How often does this route fly?
Frequency
A couple of times a day
On average around 2 flights a day, observed from October 2025 to September 2026.
- 2
- flights per day
- 2
- busiest month · Jan
- 1
- quietest month · Oct
- 3 hr 21 min
- measured flight time
- 12 / 12
- months seen
Through the year
Per day, month by month
- 2Jan2026
- 2Feb
- 2Mar
- 2Apr
- 2May
- 2Jun
- 2Jul
- 1Aug
- 1Sep
- 1Oct2025
- 1Nov
- 1Dec
Airlines
Who flies it
United Airlinesall year
Frontier Airlineswinter
Through the day
Departure times
Local time in Dulles. Most departures between 08:00 and 11:00.
- 00:00
- 01:00
- 02:00
- 03:00
- 04:00
- 05:00
- 06:00
- 07:00
- 08:00
- 09:00
- 10:00
- 11:00
- 12:00
- 13:00
- 14:00
- 15:00
- 16:00
- 17:00
- 18:00
- 19:00
- 20:00
- 21:00
- 22:00
- 23:00
Through the week
By weekday
- 1.4Mon
- 1.2Tue
- 1.2Wed
- 1.2Thu
- 1.2Fri
- 1.3Sat
- 1.4Sun
Fleet
Aircraft observed
- Boeing 737 MAX 9B39M60%
- Boeing 737 MAX 8B38M19%
- Airbus A321neoA21N4%
- Boeing 737-900B7394%
- Airbus A320neoA20N2%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 66 |
|
| February 2026 | 2 | 50 |
|
| March 2026 | 2 | 55 |
|
| April 2026 | 2 | 51 |
|
| May 2026 | 2 | 53 |
|
| June 2026 | 2 | 49 |
|
| July 2026 | 2 | 46 |
|
| August 2026 | 1 | 36 |
|
| September 2026 | 1 | 26 |
|
| October 2025 | 1 | 3 |
|
| November 2025 | 1 | 10 |
|
| December 2025 | 1 | 18 |
|
Airlines observed on this route
From observed callsign routes on IAD-SJU - not a booking guarantee.
About this route
- International route: Dulles and San Juan are in different countries.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from Dulles: 171.
- Direct destinations observed from San Juan: 59.
The airports on this route
Luis Munoz Marin International Airport
San Juan, Puerto RicoSJU / TJSJ
Major airport · 59 direct destinations · 2 runways · longest runway 10,003 ft
88 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
IAD SIGFernando Luis Ribas Dominicci AirportSan Juan is about 6 mi from San Juan.View route →DCA SJURonald Reagan Washington National AirportWashington is about 24 mi from Dulles.View route →BWI SJUBaltimore/Washington International Thurgood Marshall AirportBaltimore is about 45 mi from Dulles.View route →
About the route from Dulles to San Juan
The observed direct connection between Washington Dulles International Airport (IAD) and Luis Munoz Marin International Airport (SJU) covers approximately 1,575 mi. The estimated flight time is around 3h 40m. Frontier Airlines and United Airlines have been observed on this connection in the available route data.
Frequently asked questions about this route
- How far is Dulles from San Juan by air?
- The great-circle distance between Washington Dulles International Airport and Luis Munoz Marin International Airport is approximately 1,575 mi.
- How long is the flight from Dulles to San Juan?
- Based on the distance, the estimated flight time is about 3h 40m. This is an estimate, not a schedule.
- Is there a direct connection from Dulles to San Juan?
- Yes, a direct connection between IAD and SJU has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: Frontier Airlines and United Airlines.
- How often is there a flight from Dulles to San Juan?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 463 observed flights. Mainly United Airlines, Frontier Airlines. That is an observation, not a timetable.
- What is the current time difference between Dulles and San Juan?
- Same local time in Dulles and San Juan.
Where this data comes from
The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.
The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.
Route data updated on October 11, 2026.