Washington Dulles International Airport
Dulles, United StatesIAD / KIAD
International hub · 171 direct destinations · 4 runways · longest runway 11,499 ft
64 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center
Route
Dulles → San Juan
IAD
DullesWashington Dulles International Airport
DullesWashington Dulles International AirportSIG
San JuanFernando Luis Ribas Dominicci Airport
San JuanFernando Luis Ribas Dominicci Airport- Distance
- 1,571 mi
- Estimated flight time
- ~3h 40m
Same local time in Dulles and San Juan.
Observed nonstop
How often does this route fly?
Frequency
Daily at most
On average around 1 flights a day, observed from October 2025 to September 2026.
- 1
- flights per day
- 1
- busiest month · Feb
- 3 hr 20 min
- measured flight time
- 3 / 12
- months seen
Through the year
Per day, month by month
- –Jan2026
- 1Feb
- 1Mar
- 1Apr
- –May
- –Jun
- –Jul
- –Aug
- –Sep
- –Oct2025
- –Nov
- –Dec
Airlines
Who flies it
United Airlinesnow and then
Through the day
Departure times
Local time in Dulles. 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
- 0Mon
- 0Tue
- 0Wed
- 0Thu
- 0Fri
- 0Sat
- 0Sun
Fleet
Aircraft observed
- Boeing 737 MAX 9B39M63%
All the numbers in a table
| Month | Per day | Seen | Airlines |
|---|---|---|---|
| January 2026 | Not seen in this month. | ||
| February 2026 | 1 | 2 |
|
| March 2026 | 1 | 3 |
|
| April 2026 | 1 | 3 |
|
| May 2026 | Not seen in this month. | ||
| June 2026 | Not seen in this month. | ||
| July 2026 | Not seen in this month. | ||
| August 2026 | Not seen in this month. | ||
| September 2026 | Not seen in this month. | ||
| October 2025 | Not seen in this month. | ||
| November 2025 | Not seen in this month. | ||
| December 2025 | Not seen in this month. | ||
Airlines observed on this route
From observed callsign routes on IAD-SIG - not a booking guarantee.
About this route
- International route: Dulles and San Juan are in different countries.
- Direct destinations observed from Dulles: 171.
- Direct destinations observed from San Juan: 3.
The airports on this route
Fernando Luis Ribas Dominicci Airport
San Juan, Puerto RicoSIG / TJIG
Regional airport · 3 direct destinations · 1 runway · longest runway 5,318 ft
80 °F · ClearSource: forecast by MET Norway (adapted), licensed under CC BY 4.0
Alternative airports for this journey
Same journey, a different airport nearby - with an observed direct connection.
About the route from Dulles to San Juan
The observed direct connection between Washington Dulles International Airport (IAD) and Fernando Luis Ribas Dominicci Airport (SIG) covers approximately 1,571 mi. The estimated flight time is around 3h 40m. United Airlines has 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 Fernando Luis Ribas Dominicci Airport is approximately 1,571 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 SIG has been observed in our route data.
- Which airlines have been observed on this route?
- In the available route data: United Airlines.
- How often is there a flight from Dulles to San Juan?
- On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 8 observed flights. Mainly United 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.