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$399+ Cheap flights from Boise (BOI) to Portugal

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Jun 17 — Jun 241
Tue 6/17
Tue 6/24
1 adult, Economy
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Cheap flight deals from Boise to Portugal

Keep the following information in mind while searching for Boise to Portugal flight deals. Data was last updated June 12, 2025.

Round-trip from

$868
(United Airlines)

One-way from

$487
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,453
From Boise Air Term. Gowen Fld to Portugal
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One-way flight from Boise Air Term. Gowen Fld to Portugal
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Highest demand for flights based on searches. 15% potential increase in price ($196 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($37 potential savings vs. average RT price).
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Average for round-trip flights in June 2025
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Find flight deals from Boise to Portugal

Cheapest flights from Boise to Portugal
Explore the most affordable flight options available from Boise to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 12, 2025.

This United Airlines deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/46:15 amBOI - LIS
2 stops18h 55mUnited Airlines
Tue 11/1811:00 amLIS - BOI
2 stops31h 39mUnited Airlines
Deal found 6/9$586
This Air Canada deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/65:00 amBOI - LIS
2 stops21h 20mAir Canada
Tue 11/1811:00 amLIS - BOI
2 stops42h 55mAir Canada
Deal found 6/9$631
This Travelocity deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/52:31 pmBOI - LIS
2 stops17h 19mLufthansa
Mon 11/173:55 pmLIS - BOI
2 stops36h 26mLufthansa
Deal found 6/9$642
This Iberia deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/67:21 amBOI - LIS
2 stops17h 19mIberia
Mon 11/178:45 pmLIS - BOI
2 stops22h 48mIberia
Deal found 6/9$703
This American Airlines deal was found by Cheapflights users on 6/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/78:00 amBOI - LIS
2 stops18h 05mMultiple Airlines
Wed 10/156:35 amLIS - BOI
2 stops21h 37mMultiple Airlines
Deal found 6/11$767
This Delta deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/45:40 amBOI - LIS
2 stops20h 20mDelta
Sun 11/1611:15 amLIS - BOI
2 stops20h 02mDelta
Deal found 6/9$821
This KLM deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/511:30 amBOI - LIS
2 stops20h 05mKLM
Sun 11/165:00 amLIS - BOI
2 stops24h 43mKLM
Deal found 6/9$886
This Finnair deal was found by Cheapflights users on 6/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/317:00 amBOI - LIS
2 stops33h 05mFinnair
Sun 9/76:35 amLIS - BOI
2 stops22h 10mFinnair
Deal found 6/9$956
This KAYAK deal was found by Cheapflights users on 6/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/128:46 pmBOI - LIS
2 stops18h 29mIcelandair
Thu 7/1710:20 pmLIS - BOI
2 stops31h 26mIcelandair
Deal found 6/10$1,224

Cheapflights Fare Finder

Customize your flight search to find flights from Boise to Portugal that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
Use the filters below to find and compare flights from Boise to Portugal that are best for you.

Fly from

Boise

Fly to

Portugal

Route

Depart

Return

Price

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 11/4

6:15 am-8:10 am

2 stops18h 55m

Lisbon Humberto Delgado

Tue 11/18

11:00 am-11:39 am

2 stops31h 39m

$586

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 11/6

5:00 am-9:20 am

2 stops21h 20m

Lisbon Humberto Delgado

Tue 11/18

11:00 am-10:55 pm

2 stops42h 55m

$631

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Wed 11/5

2:31 pm-2:50 pm

2 stops17h 19m

Lisbon Humberto Delgado

Mon 11/17

3:55 pm-9:21 pm

2 stops36h 26m

$642

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 11/6

7:21 am-7:40 am

2 stops17h 19m

Lisbon Humberto Delgado

Mon 11/17

8:45 pm-12:33 pm

2 stops22h 48m

$703

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 10/7

8:00 am-9:05 am

2 stops18h 05m

Lisbon Humberto Delgado

Wed 10/15

6:35 am-9:12 pm

2 stops21h 37m

$767

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 11/4

5:40 am-9:00 am

2 stops20h 20m

Lisbon Humberto Delgado

Sun 11/16

11:15 am-12:17 am

2 stops20h 02m

$821

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Wed 11/5

11:30 am-2:35 pm

2 stops20h 05m

Lisbon Humberto Delgado

Sun 11/16

5:00 am-10:43 pm

2 stops24h 43m

$886

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sun 8/31

7:00 am-11:05 pm

2 stops33h 05m

Lisbon Humberto Delgado

Sun 9/7

6:35 am-9:45 pm

2 stops22h 10m

$956

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 7/12

8:46 pm-10:15 pm

2 stops18h 29m

Lisbon Humberto Delgado

Thu 7/17

10:20 pm-10:46 pm

2 stops31h 26m

$1,224

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 10/7

6:30 am-10:50 am

2 stops21h 20m

$399

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/11

Showing 1-10 of 12 results
1
2

Best time to book a flight from Boise to Portugal

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

Cheapflights Insights

Everything you need to know about your flight from Boise to Portugal

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

Currently, January is the cheapest month in which you can book a flight from Boise to Portugal (average of $612). Flying from Boise to Portugal in June is currently the most expensive (average of $1,136). 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 time of day to fly from BOI to PT?

Find hourly flight availability from Boise to Portugal. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated June 12, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Boise to Portugal as you normally would.

Rainfall in Portugal by month

Plan your trip to Portugal by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Portugal ranges from 0.2 - 4.8 inches per month. December is typically the wettest month, when rainfall can reach 4.8 in. July is typically the driest time to visit Portugal when rainfall is around 0.2 in.

Temperature in Portugal by month

Plan your trip to Portugal by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Portugal, 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 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 51.8 F).

Reviews of airlines servicing Portugal

Get insights into the airlines that provide service to Portugal. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Portugal. Reviews last updated June 12, 2025.
Finnair
7.6
Good
1,290 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Entertainment

6.9

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Finnair
7.6
Good
1,290 reviews
Finnair
7.6
Good
1,290 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Entertainment

6.9

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
United Airlines
7.4
Good
8,790 reviews
Finnair
7.6
Good
1,290 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Entertainment

6.9

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Air Canada
7.1
Good
9,531 reviews
Finnair
7.6
Good
1,290 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Entertainment

6.9

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Icelandair
7.0
Good
499 reviews
Finnair
7.6
Good
1,290 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Entertainment

6.9

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(
Iberia
7.0
Good
2,776 reviews
Finnair
7.6
Good
1,290 reviews

Food

6.7

Boarding

7.6

Comfort

7.4

Overall

7.6

Entertainment

6.9

Crew

8.1

Reviews

1 / 20
6.0
Good

Matt,May 2025

LHR - MIA

Difficult to say what I liked, cabin crew very miserable, looked like they were sick of the job and it was their 50th flight if the day, long wait between drinks and food was somewhat very budget. We did travel in economy but with such a long flight you'd expect this type of service with Ryanair for a two/three hour flight to benidorm, not 8 hours over the Altantic.. entertainment was limited with films and difficult to hear even with headphones on. I think the pilot spoke once and I couldn't hear him over the noise in the cabin. I'd say to say you get what you pay for but my opinion I've flown with a much better airlines. Sorry...you dud ask :(

Related info for your journey

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

  • What airport do you fly from for flights from Boise to Portugal?

    If you book a flight to Portugal from Boise, you will be flying from Air Term. Gowen Fld, which is the city’s only airport. Boise Air Term. Gowen Fld (BOI) is located 3.3 mi from the center of Boise.

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

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

  • How can I find direct flights from Boise to Portugal?

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

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

    Yes. Cheapflights offers flight deals from Boise to Portugal 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 Portugal?

    Currently, January is the cheapest month in which you can book a flight from Boise to Portugal (average of $612). Flying from Boise to Portugal in June is currently the most expensive (average of $1,136). 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.

See more FAQs

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See prices for flight routes from nearby airports that may be better suited for you.
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Top 4 airlines flying from Boise to Portugal

Discover the top 4 airlines that operate flights from Boise to Portugal. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated June 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$601Average$1,290FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$613Average$1,094FlexibilityNo cancel feeOn-time71%
DeltaCheapest$654Average$1,173FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$701Average$1,181FlexibilityNo cancel feeOn-time67%

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