Need help booking?
Unpublished phone-only deals available
IAH to OPO: distance & flight time
Houston (George Bush Intercontinental Houston Airport) → Porto (Francisco de Sá Carneiro Airport)
4,729 mi
7,610 km · 4,109 nm
9h 44m
estimated nonstop flight time
+6h
time difference · heading northeast
See live IAH→OPO fares Phone-only fares on this route — call free
Flight time details
4,729 miles nonstop takes roughly 9h 44m 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
- IAH — George Bush Intercontinental Houston Airport · Houston, 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 IAH
- DWH · David Wayne Hooks Memorial Airport14 mi away
- IWS · West Houston Airport23 mi away
- AAP · Andrau Airpark23 mi away
- HOU · William P Hobby Airport24 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 IAH from OPO?
The flight distance from Houston (IAH) to Porto (OPO) is 4,729 miles (7,610 km, 4,109 nautical miles), measured along the great-circle route airlines actually fly.
How long is the flight from IAH to OPO?
A nonstop flight takes about 9h 44m 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 Houston and Porto?
Porto is 6 hours ahead of Houston.
What is the cheapest way to fly from IAH to OPO?
Compare live fares online, then call CheapoTrav — our agents have unpublished consolidator fares on IAH–OPO that never appear on search engines, with no booking fees.