821 € Cheap Flights from Boise to Porto

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      Travellers and cabin class, 1 Adult, Economy

      Compare Boise to Porto flight deals

      Find the cheapest month or even day of the year to fly to Porto

      Book the best Porto fare with no extra fees

      Find the cheapest month to fly from Boise to Porto

      We’re always keeping an eye on fares, so you can find the best one in seconds. It looks like Boise to Porto flights are currently cheapest in August.

      Boise to Porto: Alternative routes

      Compare routes from Boise to Porto below. You may find an airport to fly into that's cheaper, faster, or easier than Porto.

      Boise to Porto: Flight information

      The things to know before you go.
      Cheapest flight found821 €
      Cheapest month to flyAugust

      Finding cheap flights from Boise to Porto: Frequently asked questions

      The best price we found for a return flight from Boise to Porto is 821 €. This is an estimate based on information collected from different airlines and travel providers over the last 4 days and is subject to change and availability.
      Currently, there are no airlines that fly direct from Boise to Porto. But we found flights with one or more stops from 821 €.
      As of July 2026, there are no flights flying from Boise to Porto.
      The cheapest month to fly from Boise to Porto is usually August.
      After crunching the numbers on our flight calendar, we found that it's currently cheapest to fly from Boise Airport to Porto Airport on Thursday, 13 August 2026.
      No airlines currently offer direct flights between Boise Airport and Porto Airport. Most routes have one or more stops.
      We show every price from over 1,200 airlines and travel agents, comparing them all so you don’t have to. If you know you want to fly to Porto but you’re not ready to book, set up a Price Alert. We’ll track prices for you, and let you know when they rise or fall.

      We crunched all the numbers in our flight calendar and it looks like the cheapest time to book a flight to Porto is around 40 days in advance, so don’t leave your flight to the last minute.

      Currently, Delta offers the cheapest flight tickets to Porto.

      Travelling from Boise Airport (BOI) to Porto Airport (OPO): what you need to know

      • Porto's timezone is UTC+0, making Porto seven hours ahead of Boise.

      • Arriving two hours before an international flight and one hour ahead of a domestic departure are travel rules worth sticking to. Show up at the airport on time to board your BOI to OPO flight.

      • Flying during a peak time like October? School holidays and other popular periods can lead to longer queues and delays at check-in and security. Play things extra safe and get there up to four hours before an international flight and two hours before a domestic departure.

      How to find the cheapest flights from Boise Airport (BOI) to Porto Airport (OPO)

      • Right now, 367 € is the lowest price we've seen for a one-way Boise Airport to Porto Airport flight. The best price for a return plane ticket is 821 €. Keep in mind that fares could change due to availability when booking.

      • Don't wait until the last minute. You're more likely to get cheap tickets from BOI to OPO if you book in advance. Airlines often have some great early bird deals.

      • If you're flexible with your travel dates, use the 'Whole month' search function. It'll show you the lowest price across each month when looking for your flight from Boise Airport to Porto Airport.

      • Picking up cheap flights from BOI to OPO is a breeze with Price Alerts. Simply set up one of these automatic alerts and we'll notify you as soon as there's a better deal.

      • Discover the right flight for you with the help of the filters. To see the 'Best,' 'Fastest' or 'Cheapest' flights from Boise Airport to Porto Airport, use the 'Sort by' function. You can also filter results by airline, departure and arrival times, and journey duration.

      Handy information about Boise Airport (BOI)

      • You'll find BOI at 3201 Airport Way.

      • Boise Airport has a strong on-time record, so flight disruptions are less likely. Departures from BOI arrive on schedule 84% of the time.

      • Central Boise to Boise Airport is approximately 6 kilometres. Depending on traffic, it'll take you about 15 minutes to get there if you're driving, ride-sharing or catching a taxi.

      • The journey on public transport usually takes 30 minutes.

      • Looking for a convenient hotel close to BOI? If you're catching an early flight from Boise Airport to Porto Airport, these stays will have you moments from check-in:

      Arriving at Porto Airport (OPO)

      • Consider staying in a hotel near OPO if you're on a late Boise Airport to Porto Airport flight. Select one of these accommodation options and skip the long transfer:

      • Pick up a Porto Airport rental car and discover Porto and beyond with your own set of wheels. Klass Wagen, Goldcar and Drive & Go are leading providers you can book with here.

      • Get the best deal by reserving your vehicle from Porto Airport around three weeks before your departure date.

      When to fly to Porto Airport (OPO)

      • August is the busiest month for flights from Boise Airport to Porto Airport. To steer clear of the crowds, travel to Porto in March.

      • The warmest month in Porto is August, with the temperature ranging between 14ºC (57ºF) and 32ºC (90ºF). Book your flights from Boise Airport to Porto Airport in this month if this is the type of weather you enjoy.

      • If you'd rather travel in cooler conditions, look for a cheap ticket from BOI to OPO in January. Temperatures average between 3ºC (37ºF) and 14ºC (57ºF) then.

      Explore more of Portugal

      • You've done Porto, now it's time to explore more of Portugal. Travel around 274 kilometres south to Lisbon to tick off its must-visit sights. From Pasteis de Belém to belém and Real Mosteiro de Santa Maria de Belém, your itinerary will be busy.

      • Around 274 kilometres south of Porto, Amadora is another essential stop in Portugal. Get a taste of what this destination has to offer at Roman Villa, Park Fantasia and Palácio dos Condes da Lousã.

      Prices shown on this page are estimated lowest prices only. Found in the last 12 days.