San Francisco – Lisbon, Portugal. $507 (Basic Economy) / $727 (Regular Economy). Roundtrip, including all Taxes – The Flight Deal

Explore an excellent fare to Lisbon, a city often overlooked as a tourist gem. Prices may vary slightly based on flight routing.

United Airlines and its partners, including Air Canada, Austrian Airlines, Lufthansa, and Swiss Air, offer a competitive fare of $727, which is a standard economy ticket with one checked bag and a standard carry-on included.

Alternatively, United and its partners have a cheaper fare of $507, which is categorized as Basic Economy / Economy Light. Please note the following restrictions with these Basic Economy fares:

• Seat assignments cannot be arranged in advance.
• Checked baggage is not included — expect to pay $75 for the first bag and $100 for a second bag each way.
• Changes or modifications to bookings are not allowed.
• Cancellations are also not permitted; if you cancel after the 24-hour risk-free period, the Basic Economy ticket will hold no value for future use.
• Many online travel agencies may not clearly label these fares as BASIC ECONOMY for United, Air Canada, Austrian, Lufthansa, and Swiss Air.

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Marquess of Pombal Square, Lisbon, Portugal – Photo courtesy of দেবর্ষি রায় via Flickr, used under Creative Commons License (By 2.0)

Sample Travel Date:

• This is just one example date. For additional options, please refer to the “Fare Availability” and “How to Search for Availability” sections below.

Fare Availability:

• Fares are valid for travel in late March, November to early December, or January 2026 with departures from Sunday to Wednesday and returns from Tuesday to Friday. A Sunday stay is necessary, and limited availability applies. Tickets must be purchased at least 7 days prior to departure.

• Keep in mind that while this fare is accurate at the time of publication, it may no longer be available if this post is older than two days.

How to Search for Availability:

• This section is meant only for checking availability. To purchase tickets, please proceed to the “How to Buy” section below.

• Utilize the Matrix Airfare Search by ITA Software with the following criteria:
  • Origin: SFO
  • Advanced Routing Code:
    • Routing Codes: ua ua
    • Extension Codes: f .. KLX5YLGT ; maxconnect 360
      • This will instruct the Matrix Airfare Search to find Basic Economy fares. Use those dates within United for the option to upgrade to standard economy fares.
  • Destination: LIS
  • Return Advanced Routing Code:
    • Routing Codes: ua ua
    • Extension Codes: f .. KLX5YLGT ; maxconnect 360
  • (Click on the Advanced Codes link to enable inputting advanced routing codes.)
  • Select “See calendar of lowest fares.”
  • Duration “3-10” (This is a suggestion; any 7-day interval like 3-10 or 7-14 will suffice.)
• Refer to the Beginner’s Guide on how to use Matrix by ITA Software.
• Learn how to interpret airfare rules for your benefit.

• The Matrix Airfare Search page should resemble the example below once all values are entered.

• Purchasing tickets cannot be done through Matrix Airfare Search. For buying tickets, consult the “How to Buy” section below.

Fare Class:

Elite Qualifying Dollars:

Routing:

• SFO – YUL (Montreal)- LIS (Lisbon) – IAD (Washington D.C.) – SFO

Stopover:

Mileage:

• Miles Flown: 11,774 miles or approximately 4.3 cents per mile (Basic Economy) / 6.2 cents per mile (Regular Economy).
• Redeemable Miles: 3,005 miles.

How to Buy:

• Make your reservation on United using the dates you found on Matrix Airfare Search by ITA Software.

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Background Information:

• Visa: Not required for US citizens. Other nationalities should consult the TIMATIC Visa Database for specific requirements.
• Currency: Euro (EUR). Exchange rate: $1 USD = 0.92 EUR.

Credit Card Tips for International Travel:

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The Flight Deal does not sell travel products or services directly. We provide information about third-party offers and link you to their platforms. The information provided by The Flight Deal is accurate at the time of publication, but we cannot guarantee availability or changes made by suppliers. For their most current offers and terms, please visit their websites.