Need help booking?
Unpublished phone-only deals available
CGX to OPO: distance & flight time
Chicago (Chicago Meigs Airport) → Porto (Francisco de Sá Carneiro Airport)
3,925 mi
6,316 km · 3,410 nm
8h 10m
estimated nonstop flight time
+6h
time difference · heading northeast
See live CGX→OPO fares Phone-only fares on this route — call free
Flight time details
3,925 miles nonstop takes roughly 8h 10m 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
- CGX — Chicago Meigs Airport · Chicago, United States
- OPO — Francisco de Sá Carneiro Airport · Porto, 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 CGX
- ORD · Chicago O'Hare International Airport17 mi away
- MDW · Chicago Midway International Airport9 mi away
- GYY · Gary Chicago International Airport20 mi away
- PWK · Chicago Executive Airport23 mi away
Near OPO
- BGZ · Braga Municipal Aerodrome26 mi away
- VRL · Vila Real Airport50 mi away
- VSE · Aerodromo Goncalves Lobato (Viseu Airport)55 mi away
- VGO · Vigo Airport68 mi away
Frequently asked questions
How far is CGX from OPO?
The flight distance from Chicago (CGX) to Porto (OPO) is 3,925 miles (6,316 km, 3,410 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from CGX to OPO?
A nonstop flight takes about 8h 10m 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 Chicago and Porto?
Porto is 6 hours ahead of Chicago.
What is the cheapest way to fly from CGX to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on CGX–OPO that never appear on search engines, with no booking fees.