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Portugal

$460+ Cheap flights from Idaho 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 3/20. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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Cheap flight deals from Idaho to Portugal

Keep the following information in mind while searching for Idaho to Portugal flight deals. Data was last updated February 20, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$822
(American Airlines)

One-way from

$460
(Kiwi.com)

Popular in

June

Cheapest in

March

Average price

$790
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Lisbon Humberto Delgado flight deals.
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Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Lisbon Humberto Delgado flights.
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From Idaho to Portugal
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One-way flight from Idaho to Portugal
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Highest demand for flights based on searches. 19% potential increase in price ($268 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in February 2025
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Find flight deals from Idaho to Portugal

Cheapest flights from Idaho to Portugal
Explore the most affordable flight options available from Idaho to Portugal. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 20, 2025.

This American Airlines deal was found by Cheapflights users on 2/18. 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.
Wed 3/197:05 amBOI - LIS
2 stops19h 50mAmerican Airlines
Wed 3/2611:15 amLIS - BOI
2 stops18h 21mAmerican Airlines
Deal found 2/18$822
This United deal was found by Cheapflights users on 2/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/2410:39 amBOI - LIS
2 stops16h 36mUnited Airlines
Sun 12/711:55 amLIS - BOI
2 stops28h 48mUnited Airlines
Deal found 2/19$843
This Ovago deal was found by Cheapflights users on 2/19. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/131:00 pmBOI - LIS
2 stops37h 05mMultiple Airlines
Wed 5/217:15 amLIS - BOI
2 stops20h 43mMultiple Airlines
Deal found 2/19$877
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 4/177:00 amJAC - LIS
2 stops45h 10mUnited Airlines
Mon 4/2812:15 pmLIS - JAC
2 stops39h 37mUnited Airlines
Deal found 2/20$918
This Cheapflightsfares deal was found by Cheapflights users on 2/20. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/82:38 pmBOI - LIS
2 stops17h 47mLufthansa
Wed 4/166:15 amLIS - BOI
2 stops22h 07mLufthansa
Deal found 2/20$919
This Iberia deal was found by Cheapflights users on 2/19. 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.
Mon 4/211:41 pmBOI - LIS
2 stops26h 44mIberia
Wed 4/308:45 pmLIS - BOI
2 stops32h 26mIberia
Deal found 2/19$938
This United deal was found by Cheapflights users on 2/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/175:00 amGEG - LIS
2 stops32h 50mUnited Airlines
Tue 5/1311:25 amLIS - GEG
2 stops41h 30mUnited Airlines
Deal found 2/19$962
This American Airlines deal was found by Cheapflights users on 2/20. 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.
Thu 4/2412:53 pmJAC - LIS
2 stops27h 07mAmerican Airlines
Sun 5/412:30 pmLIS - JAC
2 stops32h 51mAmerican Airlines
Deal found 2/20$1,058
This Booking.com deal was found by Cheapflights users on 2/18. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 4/56:30 amBOI - LIS
2 stops21h 40mAir Canada
Sat 4/1211:25 amLIS - BOI
2 stops53h 22mAir Canada
Deal found 2/18$1,093
This FlightHub deal was found by Cheapflights users on 2/19. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/75:15 amGEG - LIS
2 stops44h 05mMultiple Airlines
Sat 6/143:35 pmLIS - GEG
2 stops37h 13mMultiple Airlines
Deal found 2/19$1,233
This AranGrant deal was found by Cheapflights users on 2/20. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/2611:00 amBOI - LIS
2 stops26h 40mScandinavian Airlines
Fri 6/66:25 pmLIS - BOI
2 stops33h 33mScandinavian Airlines
Deal found 2/20$5,101
This AranGrant deal was found by Cheapflights users on 2/19. 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 AranGrant is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 6/11:00 pmGEG - LIS
2 stops23h 40mScandinavian Airlines
Mon 6/97:15 amLIS - GEG
2 stops17h 44mScandinavian Airlines
Deal found 2/19$5,259

Find flights from Idaho to Portugal within your budget

Customize your flight search to find flights from Idaho 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 February 20, 2025.

Fly from

Idaho

Fly to

Portugal

Route

Depart

Return

Price

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Wed 3/19

7:05 am-8:55 am

2 stops19h 50m

Lisbon Humberto Delgado

Wed 3/26

11:15 am-11:36 pm

2 stops18h 21m

$822

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 5/13

1:00 pm-9:05 am

2 stops37h 05m

Lisbon Humberto Delgado

Wed 5/21

7:15 am-8:58 pm

2 stops20h 43m

$877

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Wed 3/19

11:10 am-11:30 pm

2 stops30h 20m

Lisbon Humberto Delgado

Wed 3/26

11:00 am-11:15 pm

2 stops42h 15m

$882

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Thu 4/17

7:00 am-11:10 am

2 stops45h 10m

Lisbon Humberto Delgado

Mon 4/28

12:15 pm-8:52 pm

2 stops39h 37m

$918

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 4/8

2:38 pm-3:25 pm

2 stops17h 47m

Lisbon Humberto Delgado

Wed 4/16

6:15 am-9:22 pm

2 stops22h 07m

$919

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Mon 4/21

1:41 pm-11:25 pm

2 stops26h 44m

Lisbon Humberto Delgado

Wed 4/30

8:45 pm-10:11 pm

2 stops32h 26m

$938

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Thu 4/17

5:00 am-9:50 pm

2 stops32h 50m

Lisbon Humberto Delgado

Tue 5/13

11:25 am-8:55 pm

2 stops41h 30m

$962

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Thu 4/24

12:53 pm-11:00 pm

2 stops27h 07m

Lisbon Humberto Delgado

Sun 5/4

12:30 pm-2:21 pm

2 stops32h 51m

$1,058

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 4/5

6:30 am-11:10 am

2 stops21h 40m

Lisbon Humberto Delgado

Sat 4/12

11:25 am-9:47 am

2 stops53h 22m

$1,093

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Sat 6/7

5:15 am-9:20 am

2 stops44h 05m

Lisbon Humberto Delgado

Sat 6/14

3:35 pm-8:48 pm

2 stops37h 13m

$1,233

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/19

Showing 1-10 of 17 results
1
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Best time to book a flight from Idaho to Portugal

Have a flexible travel schedule? Discover the best time to fly to Portugal from Idaho 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.

Travel insights for flights from Idaho to Portugal

Get recent, data-driven insights about flights from Idaho to Portugal including ideal travel times, pricing trends, and more.

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

Currently, January is the cheapest month in which you can book a flight from Idaho to Portugal (average of $612). Flying from Idaho to Portugal in June is currently the most expensive (average of $1,234). 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 ID to PT?

Find hourly flight availability from Idaho 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 February 20, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Idaho 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 February 20, 2025.
To help decide which airline to fly from Idaho to Portugal, see what other customers have to say about United Airlines, Scandinavian Airlines and American Airlines. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
United Airlines
7.4
Good
8,765 reviews

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

United Airlines
7.4
Good
8,765 reviews
United Airlines
7.4
Good
8,765 reviews

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Scandinavian Airlines
7.3
Good
1,325 reviews
United Airlines
7.4
Good
8,765 reviews

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,765 reviews

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Air Canada
7.0
Good
8,748 reviews
United Airlines
7.4
Good
8,765 reviews

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Iberia
7.0
Good
2,639 reviews
United Airlines
7.4
Good
8,765 reviews

Food

6.7

Boarding

7.7

Comfort

7.3

Overall

7.4

Crew

8.1

Entertainment

7.1

Reviews

1 / 20

2.0
Mediocre

Deb,Jan 2025

MKE - ORD

It was terrible! So much to say, but in a nutshell we used vouchers from United because our last trip with them was awful with many mishaps and errors made. Unfortunately, this trip was even worse!

Related info for your journey

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

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Idaho to Portugal (average of $612). Flying from Idaho to Portugal in June is currently the most expensive (average of $1,234). 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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Alternative routes for Idaho to Portugal

See prices for flight routes from nearby airports that may be better suited for you.
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Top 6 airlines flying from Idaho to Portugal

Discover the top 6 airlines that operate flights from Idaho 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$613Average$1,089FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$654Average$1,042FlexibilityNo cancel feeOn-time77%
DeltaCheapest$654Average$1,155FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$701Average$1,191FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$726Average$1,215FlexibilityNo cancel feeOn-time69%
KLMCheapest$814Average$1,038FlexibilityNo cancel feeOn-time75%
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