Discover an amazing deal to Lisbon! This underrated tourist destination offers a unique experience. Prices may slightly vary based on your chosen routing.
United Airlines, alongside its partners—Air Canada, Austrian, Lufthansa, and Swiss Air—has a standard economy fare at $777, which includes one checked bag and a standard carry-on.
They also offer a Basic Economy fare starting at $577, but be aware of the following limitations:
- NO advance seat assignments allowed
- NO checked bags included—$75 each way for the first bag and $100 for the second
- NO changes permitted
- NO cancellations allowed—if you cancel after the 24-hour risk-free period, the Basic Economy ticket loses its value for future purchases
- Many online travel agencies may not accurately label these fares as BASIC ECONOMY
Sign up for our Real-Time Newsletter to get economy class deals for your city about an hour before they appear on our website and social media—all for just a nickel a day.
If you’re interested in Business Class, First Class, or Premium Economy deals, subscribe to our Premium Newsletter for about a quarter a day.

Marquess of Pombal Square, Lisbon, Portugal – Photo: দেবর্ষি রায় via Flickr, under Creative Commons License (By 2.0)
Sample Travel Date:
- This is a SAMPLE travel date; for more options, please refer to the “Fare Availability” and “How to Search for Availability” sections below.
Fare Availability:
- Travel is valid from November to early December or January 2026 to March 2026 for departures between Sunday and Wednesday, and returns from Tuesday to Friday. A Sunday night stay is required. Limited availability; tickets must be purchased at least 7 days in advance.
- Note: This fare is valid at the time of posting, but if this information is more than two days old, the fare may no longer be available.
How to Search for Availability:
- For availability search only; to purchase tickets, refer to the “How to Buy” section below.
- Use Matrix Airfare Search by ITA Software with the following criteria:
- Origin: SFO
- Origin Advanced Routing Code:
- Routing Codes: ua ua
- Extension Codes: f .. LLX46LGT ; maxconnect 360
- This will instruct the Matrix search to look for Basic Economy fares. Once you select dates on United, options to upgrade to the regular economy fare will be presented.
- Destination: LIS
- Return Advanced Routing Code:
- Routing Codes: ua ua
- Extension Codes: f .. LLX46LGT ; maxconnect 360
- (Click on Advanced Codes link to enable advanced routing code input)
- Select “See calendar of lowest fares”
- Duration “3-10” (This is just an example; any 7-day date range like 3-10, 7-14, etc., works)
- Refer to the Beginner’s Guide on How to Use Matrix by ITA Software.
- Learn How to Read Airfare Rules and Maximize Your Advantage.
- The Matrix Airfare Search by ITA Software page should resemble the example below once all fields are filled out.

- You cannot purchase tickets directly through Matrix Airfare Search by ITA Software. To buy, please follow the “How to Buy” instructions below.
Fare Class:
Elite Qualifying Dollars:
Routing:
- SFO – IAD (Washington D.C.) – LIS (Lisbon) – IAD – SFO
Stopover:
Mileage:
- Miles Flown: 11,984 miles, equating to 4.8 cents per mile for Basic Economy and 6.5 cents per mile for Regular Economy
- Redeemable Miles: 3,220 miles
How to Buy:
- Reserve tickets on United using dates found on Matrix Airfare Search by ITA Software.

Accommodations
- TripAdvisor – A major hotel meta-search engine helping you find the best prices from over 200 sites.
Car Rentals
- Rental Cars – One of the world’s leading car rental services, featuring major brands like Hertz, Avis, Budget, Dollar, and Enterprise.
Activities and Tours
- Viator – The largest marketplace for destination activities and tours.
Background Information:
- Visa: U.S. citizens do not require a visa. Other nationals should consult the TIMATIC Visa Database.
- Currency: Euro (EUR). $1 USD = 0.88 EUR
Tips for Saving When Using Credit Cards Internationally:
Stay updated on the latest cheap flight deals from San Francisco/Bay Area:
* The Flight Deal may earn a commission if you book accommodations, car rentals, activities, or apply for a credit card through our links. Thank you for your support!
=====
To receive our latest deals, LIKE our page on Facebook, follow us on Twitter @TheFlightDeal, Threads @TheFlightDeal, or subscribe to The Flight Deal RSS Feed or receive daily email updates.
The Flight Deal does not sell travel products or services. We provide information about third-party travel offers and link to their websites. Information posted is valid at the time of publication, but we have no control over suppliers, and we do not guarantee that their offers will remain unchanged. For the most current information, please refer to their respective websites and terms.


Stay Informed on the Latest Deals
Sign up to receive The Flight Deal Daily DealsLetter to keep updated on the latest flight deals.