What is the cheapest airline to fly from Boise to Porto round-trip?

Our cheapest airline available from Boise to Porto is United Airlines. Our recent data shows that you can find tickets from as low as $647 on this airline. United Airlines is currently priced 39% below the average price you’ll pay for this route.

What is the cheapest month to book a flight from Boise to Porto?

Currently, January is the cheapest month in which you can book a flight from Boise to Porto (average of $523). Flying from Boise to Porto in June is currently the most expensive (average of $1,027). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

What is the cheapest day to fly from Boise to Porto?

Travelers seeking maximum savings on their Boise to Porto flight should consider departing on Tuesday mornings when fares are most often at their lowest. Tuesday mornings flights should be avoided if possible as fares are typically the most expensive at this time.

In terms of precipitation, rainfall in Porto ranges from 0.7 - 7.7 inches per month. December is typically the wettest month, when rainfall can reach 7.7 in. July is typically the driest time to visit Porto when rainfall is around 0.7 in.

If weather is an important factor for your trip to Porto, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 68.0 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 48.2 F).

What is the cheapest day to fly round-trip from Boise to Porto?

Monday flights are generally found to be more expensive for flights from Boise to Porto. This shouldn’t discourage you from searching, as you can still find great deals by being flexible with your options. Use our search form to find deals on tickets to Porto.

What is the cheapest month to fly from Boise to Porto?

The best pricing can be found in the month of November. Prices to Porto from Boise average $1,070. You can even find prices in November for less than $1,070, as users have found deals to Porto from as low as $647. The month of July appears to be one of the more expensive times to travel to Porto from Boise. Flying in the targeted month can save you up to 60%.

What is the cheapest time of day to fly from BOI to OPO?

A simple way to save on the total cost of your ticket is to fly from Boise to Porto at noon. If you’re flexible enough to do this you can expect to save up to 29% on your trip compared to booking a flight in the morning.

Can I find deals for flights from Boise to Porto that include hotel bookings?

Yes. In addition to deals on Boise to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.

How can I find direct flights from Boise to Porto?

After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Porto.

Can I find deals for business class flights from Boise to Porto?

Yes. Cheapflights offers flight deals from Boise to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

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Cheap flight deals from Boise to Porto

Popular in	July
Cheapest in	November
Average price	$1,367

Highest demand for flights based on searches. 25% potential increase in price ($359 potential increase over avg. RT price).

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Cheapest flight prices on average. 7% potential price decrease ($73 potential savings vs. average RT price).

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Average for round-trip flights in September 2025

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Best time to book a flight from Boise to Porto

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Estimated round-trip price

Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Reviews of airlines servicing Porto

Peruse reviews from past customers who have flown with United Airlines from Boise to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

United Airlines

7.4

Good

8,937 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

United Airlines

7.4

Good

8,937 reviews

United Airlines

7.4

Good

8,937 reviews

Reviews

1 / 20

4.0

Okay

Thomas,Mar 2025

SFO - TPE

When I asked for an extra snack, I got an unhappy look from the stewardess. Geez, does one extra snack really affect the bottom line??

Related info for your journey

What is the cheapest airline to fly from Boise to Porto round-trip?
Our cheapest airline available from Boise to Porto is United Airlines. Our recent data shows that you can find tickets from as low as $647 on this airline. United Airlines is currently priced 39% below the average price you’ll pay for this route.
Can I find deals for flights from Boise to Porto that include hotel bookings?
Yes. In addition to deals on Boise to Porto flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Boise to Porto?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Boise to Porto.
Can I find deals for business class flights from Boise to Porto?
Yes. Cheapflights offers flight deals from Boise to Porto by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.
What is the cheapest month to book a flight from Boise to Porto?
Currently, January is the cheapest month in which you can book a flight from Boise to Porto (average of $523). Flying from Boise to Porto in June is currently the most expensive (average of $1,027). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

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Top airline flying from Boise to Porto

Airline	Cheapest	Average	Flexibility	On-time
United Airlines	Cheapest$647	Average$1,234	FlexibilityNo cancel fee	On-time69%

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Find cheap flights from Boise to Porto with Cheapflights

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Cheap flight deals from Boise to Porto

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Best time to book a flight from Boise to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Boise with our price prediction graph.

Reviews of airlines servicing Porto

Peruse reviews from past customers who have flown with United Airlines from Boise to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boise to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What is the cheapest airline to fly from Boise to Porto round-trip?

Can I find deals for flights from Boise to Porto that include hotel bookings?

How can I find direct flights from Boise to Porto?

Can I find deals for business class flights from Boise to Porto?

What is the cheapest month to book a flight from Boise to Porto?

Traveling to a place near Porto?

Browse thousands of different options on Cheapflights for your next trip

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Alternative routes for Boise to Porto

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Complete your trip

Complete your trip to Porto by adding a car rental and/or hotel reservation to your travel itinerary.

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Boise and Porto flights

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Other flights from Boise

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Other flights to Porto

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Cheap flights from Boise (BOI) to Porto (OPO)

Find cheap flights from Boise to Porto with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Boise to Porto

Popular in

Cheapest in

Average price

Best time to book a flight from Boise to Porto

Have a flexible travel schedule? Discover the best time to fly to Porto from Boise with our price prediction graph.

Reviews of airlines servicing Porto

Peruse reviews from past customers who have flown with United Airlines from Boise to Porto to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Related info for your journey

Find useful and relevant information for your journey from Boise to Porto. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

What is the cheapest airline to fly from Boise to Porto round-trip?

Can I find deals for flights from Boise to Porto that include hotel bookings?

How can I find direct flights from Boise to Porto?

Can I find deals for business class flights from Boise to Porto?

What is the cheapest month to book a flight from Boise to Porto?

Traveling to a place near Porto?

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Boise to Porto

See prices for flight routes from nearby airports that may be better suited for you.

Top airline flying from Boise to Porto

100% Free

Book with Flexibility

Travel Smart