Luis Munoz Marin International Airport
San Juan, Puerto RicoSJU / TJSJ
Major airport · 59 direct destinations · 2 runways · longest runway 10,003 ft
89 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center
Route
San Juan → Dulles
SJU
San JuanLuis Munoz Marin International Airport
San JuanLuis Munoz Marin International AirportIAD
DullesWashington Dulles International Airport
DullesWashington Dulles International Airport- Distance
- 1,575 mi
- Estimated flight time
- ~3h 40m
Same local time in San Juan and Dulles.
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 · Nov
- 1
- quietest month · Oct
- 3 hr 31 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
- 2Nov
- 2Dec
In October 2025 we saw less traffic at San Juan in general than usual; compare that month with care.
Airlines
Who flies it
United Airlinesall year
Frontier Airlineswinter
Through the day
Departure times
Local time in San Juan. Most departures between 16:00 and 19:00.
- 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
- 1.9Mon
- 1.5Tue
- 1.5Wed
- 1.9Thu
- 2Fri
- 1.8Sat
- 1.9Sun
Fleet
Aircraft observed
- Boeing 737 MAX 9B39M70%
- Boeing 737-900B73911%
- Airbus A320neoA20N4%
- Airbus A321neoA21N4%
- Airbus A321A3211%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | 2 | 70 |
|
| February 2026 | 2 | 62 |
|
| March 2026 | 2 | 59 |
|
| April 2026 | 2 | 61 |
|
| May 2026 | 2 | 53 |
|
| June 2026 | 2 | 47 |
|
| July 2026 | 2 | 58 |
|
| August 2026 | 1 | 41 |
|
| September 2026 | 1 | 27 |
|
| October 2025 | 1 | 41 |
|
| November 2025 | 2 | 73 |
|
| December 2025 | 2 | 62 |
|
Airlines observed on this route
From observed callsign routes on SJU-IAD - not a booking guarantee.
About this route
- International route: San Juan and Dulles are in different countries.
- The opposite direction has also been observed as a direct connection.
- Direct destinations observed from San Juan: 59.
- Direct destinations observed from Dulles: 171.
The airports on this route
Washington Dulles International Airport
Dulles, United StatesIAD / KIAD
International hub · 171 direct destinations · 4 runways · longest runway 11,499 ft
79 °F · ClearSource: METAR observation via the NOAA Aviation Weather Center
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from San Juan to Dulles
The observed direct connection between Luis Munoz Marin International Airport (SJU) and Washington Dulles International Airport (IAD) 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 San Juan from Dulles by air?
- The great-circle distance between Luis Munoz Marin International Airport and Washington Dulles International Airport is approximately 1,575 mi.
- How long is the flight from San Juan to Dulles?
- 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 San Juan to Dulles?
- Yes, a direct connection between SJU and IAD 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 San Juan to Dulles?
- On average around 2 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 654 observed flights. Mainly United Airlines, Frontier Airlines. That is an observation, not a timetable.
- What is the current time difference between San Juan and Dulles?
- Same local time in San Juan and Dulles.
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.