Lisbon has quietly become one of the best-value gateways to Europe, with strong competition from US carriers and Portugal's own airline keeping fares down. Here is how to take advantage, and how to use Portugal as a cheap launchpad for a wider trip.
How to find cheap flights to Portugal
East Coast hubs like New York, Boston, and Newark have the most nonstops to Lisbon and the lowest fares, since Portugal is one of the closer European mainland destinations. From there, budget carriers fan out across Europe cheaply, so Lisbon doubles as a split-ticket entry point.
Lisbon or Porto?
| Airport | Best for |
|---|---|
| Lisbon (LIS) | Most US nonstops, cheapest fares, southern and central Portugal |
| Porto (OPO) | The north and the Douro Valley, often via Europe |
Find your cheapest Portugal fare
FareFinderAI compares fares to Lisbon and Porto across airlines at once so the cheapest dates and gateways stand out. Free, no account.
Search Cheap Flights Free →The cheapest time to fly to Portugal
Spring (April to May) and fall (September to October) are the best value and arguably the nicest weather, avoiding both the summer crowds and the summer price peak. Summer fares to Europe are up about 20% in 2026, so if you must go then, book 4 to 6 months out per how far ahead to book international flights.
How to book it cheap
- Fly from an East Coast hub for the most nonstops and lowest fares.
- Use Lisbon as a launchpad and continue on a budget carrier with a open-jaw home leg.
- Fly midweek per the cheapest days to fly.
- Set an alert on your gateway to Lisbon; here is how alerts work.
Planning a wider trip? See cheap flights to Europe in 2026.