If they’re not the cheapest option, try searching by month to compare costs throughout the week.
When you fly from Lisbon to San Francisco, you'll have zero airlines to choose from for your 9128 km journey. If you're planning to fly in peak season, make sure you book in advance to get a reasonable price. Or you could hold on and try to get a last-minute bargain.
If you're fairly flexible about when you want to fly to San Francisco, searching by month will show you the cheapest times to go. It’s also worth looking out for flights
Once you've selected your flight, you'll need to fill out your details to book. And don’t forget to look at Netflights’ hotels and car hire – you could save even more money on your trip when you book everything in one go.
