Cheap flights
Cheap flights from United States to Porto
Track the cheapest United States–Porto fares — currently from €283.
Fares shown in EUR, observed from live searches.
Here's everything you need to book a cheap flight from United States to Porto: the cheapest fares we've tracked, how prices change month to month, and a free alert that watches the route for you.
United States to Porto flight prices by month
The cheapest month to fly United States to Porto is Sep 2026, with fares from €283. Use the table below to find the cheapest time to travel.
| Month | Cheapest fare |
|---|---|
| Jul 2026 | €347 |
| Aug 2026 | €301 |
| Sep 2026Cheapest | €283 |
Popular destinations from United States
Frequently asked questions
How much is a flight from United States to Porto?
The cheapest United States–Porto fare we've tracked recently is €283 one-way. The lowest prices usually appear in Sep 2026.
What is the cheapest month to fly from United States to Porto?
Sep 2026 is currently the cheapest month to fly from United States to Porto, with fares from €283. See the month-by-month table above for the full year.
How far in advance should I book United States to Porto?
For United States–Porto, booking a few weeks to a few months ahead usually gives the best price. Flexible dates and mid-week departures help you save even more.
Can I set a price alert for United States to Porto?
Yes — Flyozo watches the United States–Porto route for free and emails you the moment the fare drops.
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Going the other way
Prices on this page are observed from live flight searches (4,339 recent fares), not estimates. Last updated Jun 25, 2026. Actual prices change constantly — always confirm on the booking site.