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STL to PSM: distance & flight time
St. Louis (St Louis Lambert International Airport) → Portsmouth (Portsmouth International at Pease Airport)
1,061 mi
1,707 km · 922 nm
2h 46m
estimated nonstop flight time
+1h
time difference · heading northeast
See live STL→PSM fares Phone-only fares on this route — call free
Flight time details
1,061 miles nonstop takes roughly 2h 46m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 1-hour time gain when reading arrival times on your ticket.
The two airports
- STL — St Louis Lambert International Airport · St. Louis, United States
- PSM — Portsmouth International at Pease Airport · Portsmouth, 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 STL
- SUS · Spirit of St Louis Airport16 mi away
- ALN · St Louis Regional Airport20 mi away
- BLV · Scott AFB/Midamerica Airport32 mi away
- SPI · Abraham Lincoln Capital Airport84 mi away
Near PSM
- BOS · General Edward Lawrence Logan International Airport50 mi away
- LWM · Lawrence Municipal Airport29 mi away
- MHT · Manchester-Boston Regional Airport33 mi away
- BVY · Beverly Municipal Airport34 mi away
Frequently asked questions
How far is STL from PSM?
The flight distance from St. Louis (STL) to Portsmouth (PSM) is 1,061 miles (1,707 km, 922 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from STL to PSM?
A nonstop flight takes about 2h 46m 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 St. Louis and Portsmouth?
Portsmouth is 1 hour ahead of St. Louis.
What is the cheapest way to fly from STL to PSM?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on STL–PSM that never appear on search engines, with no booking fees.