Question : Looking for the cheapest flight over the next 30 days?
Answer : As of Mar 20th, the best day for booking to San Francisco (SFO) is Apr 17th. It costs $668, which is 42% below this route's average price.
Question : Do prices fluctuate more for this route than others?
Answer : Ranging anywhere from $654 to $3,141, prices for LIS to SFO do change much more than the majority of routes from Portugal. Prices tend to be lower the further out you book.
Question : Which airline is offering the cheapest flight from LIS to SFO?
Answer : KLM is your best bet for finding that coveted low fare. They're offering fares as low as $654, while prices for other flights are as high as $3,141.
Question : How many days should you spend in San Francisco?
Answer : Over the next two months, passengers from LIS to SFO are planning on staying for 22 days on average.
Question : If your plans are flexible, have you considered changing your departure day?
Answer : Monday is your cheapest day to fly in April. Having flexibility in your travel plans means you can save more, so be sure to plan ahead when possible.