WarBird Flight is an independent booking service, not affiliated with United Airlines. Fares are recorded lows for the route across carriers; the agent quotes United Airlines's current fare on the call.

SJC → LIS · about 11h 28m nonstop · 5,662 miles · 3 airlines
Fares shown are recorded lows. An agent confirms today's live price on the call.
United Airlines serves SJC–LIS through its hub network, usually with one connection. The nonstop flight time is about 11h 28m.
Fare classes available: Basic Economy, Economy, Economy Plus, Premium Plus / First / Polaris. United has no change fees on Economy and above for travel within the US or between the US and Mexico, the Caribbean, or international destinations originating in the US. Fare difference applies.
The lowest one-way fare we have on record for this route is $738 on United. Fares like that usually show up on off-peak days and for travel booked a few weeks out; an agent can check whether a similar fare is available for your dates.
Because United Airlines treats Lisbon as a hub, this pairing tends to have frequent departures throughout the day. Southwest Airlines and Alaska Airlines also compete here, which keeps fares in check.
This is a 5,662 miles journey, about 11h 28m in the air on a nonstop, which puts it firmly in long-haul territory: baggage allowances, seat selection fees, and stopover options change the real cost of the ticket as much as the base fare does.
Lowest United Airlines fares seen in recent searches. Recorded lows, not live quotes.
For long-haul travel, mid-January to March and the shoulder months of October and November usually bring the lowest fares; June through August and the December holidays cost the most.
Tuesday, Wednesday, and Saturday departures are usually the cheapest days on long-haul routes; Friday and Sunday are the most expensive. Early-morning and late-evening flights are often priced below the midday departures.
For international travel, booking two to five months ahead usually gets the best fares; inside three weeks, prices rise sharply. Peak-season travel in summer and over the December holidays should be booked as early as possible.
Fares from a neighboring airport are sometimes far lower than the drive is long. Agents quote all of these on one call.
Licensed agents at our partner agency handle these by phone, 24/7. No charge for a quote.
United Airlines usually connects through one of its hubs on this route. The agent will compare nonstop options on other carriers.
The lowest one-way fare we have recorded recently is $738. Fares change daily; call (708) 866-8751 for today's price.
A nonstop flight takes about 11h 28m to cover 5,662 miles. Connecting itineraries add two to five hours depending on the layover.
United Airlines, Southwest Airlines, and Alaska Airlines are the carriers most likely to serve this route. We book all of them.
Yes. Licensed agents at our partner agency book United and United Express flights in every cabin and can compare them with other carriers on your route.
On most domestic routes, no. Only a personal item is included. Economy fares include a full-size carry-on.