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OSP to IAD: distance & flight time
Slupsk (Redzikowo Air Base) → Washington (Washington Dulles International Airport)
4,256 mi
6,850 km · 3,698 nm
8h 49m
estimated nonstop flight time
-6h
time difference · heading northwest
See live OSP→IAD fares Phone-only fares on this route — call free
Flight time details
4,256 miles nonstop takes roughly 8h 49m gate to gate, flying northwest. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time set-back when reading arrival times on your ticket.
The two airports
- OSP — Redzikowo Air Base · Slupsk, Poland
- IAD — Washington Dulles International Airport · Washington, United States
Distances are great-circle ("as the crow flies") — the same basis airlines use for frequent-flyer miles.
Alternate airports can cut this fare
Flying from or into a nearby airport is the #1 trick our agents use to beat online prices. Call and we'll compare every combination on one call.
Near OSP
- GDN · Gdańsk Lech Wałęsa Airport55 mi away
- QYD · Oksywie Military Air Base57 mi away
- RNN · Bornholm Airport102 mi away
- BZG · Bydgoszcz Ignacy Jan Paderewski Airport102 mi away
Frequently asked questions
How far is OSP from IAD?
The flight distance from Slupsk (OSP) to Washington (IAD) is 4,256 miles (6,850 km, 3,698 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from OSP to IAD?
A nonstop flight takes about 8h 49m gate to gate. Actual time varies with winds, routing and season — eastbound transatlantic flights, for example, are usually faster than the return.
What is the time difference between Slupsk and Washington?
Washington is 6 hours behind Slupsk.
What is the cheapest way to fly from OSP to IAD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on OSP–IAD that never appear on search engines, with no booking fees.