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CAT to ORD: distance & flight time
Cascais (Cascais Airport) → Chicago (Chicago O'Hare International Airport)
3,990 mi
6,422 km · 3,468 nm
8h 17m
estimated nonstop flight time
-6h
time difference · heading northwest
See live CAT→ORD fares Phone-only fares on this route — call free
Flight time details
3,990 miles nonstop takes roughly 8h 17m 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
- CAT — Cascais Airport · Cascais, Portugal
- ORD — Chicago O'Hare International Airport · Chicago, 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 CAT
- LIS · Humberto Delgado Airport (Lisbon Portela Airport)12 mi away
- AVR · Alverca Air Base21 mi away
- QLR · Monte Real Air Base80 mi away
- BYJ · Beja Airport / Airbase89 mi away
Near ORD
- PWK · Chicago Executive Airport9 mi away
- MDW · Chicago Midway International Airport15 mi away
- CGX · Chicago Meigs Airport17 mi away
- DPA · Dupage Airport18 mi away
Frequently asked questions
How far is CAT from ORD?
The flight distance from Cascais (CAT) to Chicago (ORD) is 3,990 miles (6,422 km, 3,468 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CAT to ORD?
A nonstop flight takes about 8h 17m 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 Cascais and Chicago?
Chicago is 6 hours behind Cascais.
What is the cheapest way to fly from CAT to ORD?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CAT–ORD that never appear on search engines, with no booking fees.