Frontier Airlines is selling cheap flights from San Francisco, United States to Puerto Rico, Puerto Rico for as low as $140 return! That works out to a cost of just 1.9 Cents Per Mile for this 7200 mile journey.

The fare only includes a small carry-on bag placed under the seat, and you need to pay extra if you want to use the overhead storage or to check bags.

Our data shows the lowest prices are available in January 2021. See the link(s) below for dates and prices.

Sample date(s) with booking link

Dec 5 – Dec 14 ($150)

Dec 6 – Dec 13 ($150)

Dec 9 – Dec 16 ($150)

Dec 10 – Dec 15 ($170)

Dec 11 – Dec 15 ($170)

Jan 7 – Jan 18 ($140)

Jan 14 – Jan 18 ($140)

Jan 21 – Jan 29 ($150)

Jan 22 – Jan 29 ($150)

Feb 10 – Feb 24 ($174)

Are you looking for an apartment to rent for your stay in Puerto Rico, Puerto Rico? Check out what has to offer!

We post many cheap flights like this one from San Francisco, United States to Puerto Rico, Puerto Rico every single day, so have a look at our Travel Deals page, or check out the related posts below!

Note: Prices are valid at the time of publishing this post, but may change in the future.

COVID-19 Note: During these uncertain times, please make sure to check the relevant Coronavirus restrictions for your destination before you book and before you fly. We recommend also checking the refund policy of the airline, as well as purchasing travel insurance for your trip.

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