What is the cheapest month to fly from Portsmouth to Dulles?

Based on current 6-month forward fare data, June 2026 is the cheapest month to fly from Portsmouth (PSM) to Dulles (IAD), with fares starting from $483.

What is the lowest current fare from PSM to IAD?

The lowest currently-listed fare from Portsmouth (PSM) to Dulles (IAD) is $483 on 2026-06-04.

Is there a direct flight from Portsmouth to Dulles?

There is currently no non-stop service from PSM to IAD. Most travellers connect through a hub airport. See our route page for current stopover options.

Cheap flights from Portsmouth to Dulles

Cheapest current fares: $483 in June 2026 on connecting flights.

Last updated May 26, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Portsmouth (PSM) to Dulles (IAD). Refreshed daily.

Portsmouth (PSM) → Dulles (IAD)

June 2026 $483

Frequently asked questions

What is the cheapest month to fly from Portsmouth to Dulles?

Based on current 6-month forward fare data, June 2026 is the cheapest month to fly from Portsmouth (PSM) to Dulles (IAD), with fares starting from $483.
What is the lowest current fare from PSM to IAD?

The lowest currently-listed fare from Portsmouth (PSM) to Dulles (IAD) is $483 on 2026-06-04.
Is there a direct flight from Portsmouth to Dulles?

There is currently no non-stop service from PSM to IAD. Most travellers connect through a hub airport. See our route page for current stopover options.

Related guides for this route

Sibling pages — full route detail, airport overviews, visa context, per-airline routes.