Need help booking?
Unpublished phone-only deals available
FSI to LIS: distance & flight time
Fort Sill (Henry Post Army Air Field (Fort Sill)) → Lisbon (Humberto Delgado Airport (Lisbon Portela Airport))
4,742 mi
7,632 km · 4,121 nm
9h 46m
estimated nonstop flight time
+6h
time difference · heading northeast
See live FSI→LIS fares Phone-only fares on this route — call free
Flight time details
4,742 miles nonstop takes roughly 9h 46m gate to gate, flying northeast. Add 45–90 minutes per connection if there's no nonstop service. Remember to factor the 6-hour time gain when reading arrival times on your ticket.
The two airports
- FSI — Henry Post Army Air Field (Fort Sill) · Fort Sill, United States
- LIS — Humberto Delgado Airport (Lisbon Portela Airport) · Lisbon, Portugal
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 FSI
- LAW · Lawton Fort Sill Regional Airport6 mi away
- DUC · Halliburton Field28 mi away
- HBR · Hobart Regional Airport44 mi away
- SPS · Sheppard Air Force Base-Wichita Falls Municipal Airport46 mi away
Near LIS
- AVR · Alverca Air Base9 mi away
- CAT · Cascais Airport12 mi away
- QLR · Monte Real Air Base74 mi away
- BYJ · Beja Airport / Airbase81 mi away
Frequently asked questions
How far is FSI from LIS?
The flight distance from Fort Sill (FSI) to Lisbon (LIS) is 4,742 miles (7,632 km, 4,121 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from FSI to LIS?
A nonstop flight takes about 9h 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 Fort Sill and Lisbon?
Lisbon is 6 hours ahead of Fort Sill.
What is the cheapest way to fly from FSI to LIS?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on FSI–LIS that never appear on search engines, with no booking fees.