What is the cheapest month to fly from Washington to Islip?

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Washington (DCA) to Islip (ISP), with fares starting from $282.

What is the lowest current fare from DCA to ISP?

The lowest currently-listed fare from Washington (DCA) to Islip (ISP) is $282 on 2026-05-28.

Is there a direct flight from Washington to Islip?

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

Cheap flights from Washington to Islip

Cheapest current fares: $282 in May 2026 on connecting flights.

Last updated May 24, 2026 · By Flightmaps Editorial

Cheapest month-by-month fares

Lowest available fare per calendar month from Washington (DCA) to Islip (ISP). Refreshed daily.

Washington (DCA) → Islip (ISP)

May 2026 $282
June 2026 $285

Frequently asked questions

What is the cheapest month to fly from Washington to Islip?

Based on current 6-month forward fare data, May 2026 is the cheapest month to fly from Washington (DCA) to Islip (ISP), with fares starting from $282.
What is the lowest current fare from DCA to ISP?

The lowest currently-listed fare from Washington (DCA) to Islip (ISP) is $282 on 2026-05-28.
Is there a direct flight from Washington to Islip?

There is currently no non-stop service from DCA to ISP. 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.