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Portugal

$279+ 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 8/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
May 6 — May 131
Tue 5/6
Tue 5/13
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 May 1, 2025.

Most accurate provider

AranGrant
3 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$701
(American Airlines)

One-way from

$279
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,100
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. 16% potential increase in price ($206 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($36 potential savings vs. average RT price).
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Average for round-trip flights in May 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 May 1, 2025.

This American Airlines deal was found by Cheapflights users on 4/30. 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.
Mon 10/201:39 pmGEG - LIS
2 stops20h 16mAmerican Airlines
Fri 10/318:45 pmLIS - GEG
2 stops21h 58mAmerican Airlines
Deal found 4/30$701
This United Airlines deal was found by Cheapflights users on 4/29. 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.
Sat 10/185:55 pmJAC - LIS
2 stops56h 25mUnited Airlines
Mon 11/36:10 amLIS - JAC
2 stops40h 02mUnited Airlines
Deal found 4/29$709
This United Airlines deal was found by Cheapflights users on 4/30. 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 9/1610:45 amBOI - LIS
2 stops39h 35mUnited Airlines
Tue 9/3011:25 amLIS - BOI
2 stops38h 09mUnited Airlines
Deal found 4/30$741
This Justfly.com deal was found by Cheapflights users on 4/30. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/245:15 amGEG - LIS
2 stops20h 05mAir Canada
Tue 10/711:25 amLIS - GEG
2 stops33h 11mAir Canada
Deal found 4/30$741
This KLM deal was found by Cheapflights users on 4/30. 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.
Sat 10/187:30 amJAC - LIS
2 stops32h 20mKLM
Mon 11/33:25 pmLIS - JAC
2 stops29h 38mKLM
Deal found 4/30$798
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/146:49 pmGEG - LIS
1 stop32h 56mMultiple Airlines
Sat 6/217:05 pmLIS - GEG
2 stops54h 02mMultiple Airlines
Deal found 4/30$889
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Sun 5/185:29 amGEG - LIS
2 stops43h 51mUnited Airlines
Wed 5/2811:25 amLIS - GEG
2 stops43h 49mUnited Airlines
Deal found 4/30$916
This Air Canada deal was found by Cheapflights users on 4/30. 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.
Tue 9/167:45 amBOI - LIS
2 stops18h 35mMultiple Airlines
Tue 9/3011:25 amLIS - BOI
3 stops29h 17mMultiple Airlines
Deal found 4/30$920
This Air Canada deal was found by Cheapflights users on 4/30. 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.
Tue 9/1610:45 amBOI - LIS
3 stops17h 20mAir Canada
Tue 9/3011:25 amLIS - BOI
3 stops29h 17mAir Canada
Deal found 4/30$931
This American Airlines deal was found by Cheapflights users on 4/30. 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 5/131:38 pmBOI - LIS
2 stops18h 52mAmerican Airlines
Wed 5/2111:00 amLIS - BOI
2 stops19h 32mAmerican Airlines
Deal found 4/30$985
This United deal was found by Cheapflights users on 4/29. 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.
Wed 10/87:00 amJAC - LIS
2 stops31h 50mMultiple Airlines
Sun 10/2611:00 amLIS - JAC
3 stops34h 12mMultiple Airlines
Deal found 4/29$1,147
This AranGrant deal was found by Cheapflights users on 4/30. 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.
Tue 7/810:42 amBOI - LIS
2 stops22h 13mLufthansa
Thu 7/246:15 amLIS - BOI
2 stops23h 37mLufthansa
Deal found 4/30$2,018

Cheapflights Fare Finder

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 May 1, 2025.
Use the filters below to find and compare flights from Idaho to Portugal that are best for you.

Fly from

Idaho

Fly to

Portugal

Route

Depart

Return

Price

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Mon 10/20

1:39 pm-5:55 pm

2 stops20h 16m

Lisbon Humberto Delgado

Fri 10/31

8:45 pm-11:43 am

2 stops21h 58m

$701

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Sat 10/18

5:55 pm-9:20 am

2 stops56h 25m

Lisbon Humberto Delgado

Mon 11/3

6:10 am-3:12 pm

2 stops40h 02m

$709

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 9/24

5:15 am-9:20 am

2 stops20h 05m

Lisbon Humberto Delgado

Tue 10/7

11:25 am-12:36 pm

2 stops33h 11m

$741

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 9/16

10:45 am-9:20 am

2 stops39h 35m

Lisbon Humberto Delgado

Tue 9/30

11:25 am-6:34 pm

2 stops38h 09m

$741

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Sat 10/18

7:30 am-10:50 pm

2 stops32h 20m

Lisbon Humberto Delgado

Mon 11/3

3:25 pm-2:03 pm

2 stops29h 38m

$798

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Sat 6/14

6:49 pm-11:45 am

1 stop32h 56m

Lisbon Humberto Delgado

Sat 6/21

7:05 pm-5:07 pm

2 stops54h 02m

$889

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Sun 5/18

5:29 am-9:20 am

2 stops43h 51m

Lisbon Humberto Delgado

Wed 5/28

11:25 am-11:14 pm

2 stops43h 49m

$916

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 9/16

7:45 am-9:20 am

2 stops18h 35m

Lisbon Humberto Delgado

Tue 9/30

11:25 am-9:42 am

3 stops29h 17m

$920

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 9/16

10:45 am-11:05 am

3 stops17h 20m

Lisbon Humberto Delgado

Tue 9/30

11:25 am-9:42 am

3 stops29h 17m

$931

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 5/13

1:38 pm-3:30 pm

2 stops18h 52m

Lisbon Humberto Delgado

Wed 5/21

11:00 am-11:32 pm

2 stops19h 32m

$985

Flights are sorted by cheapest round-trip flights first.

Deals found on 5/1

Showing 1-10 of 18 results
1
2

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.

Cheapflights Insights

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

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 $1,178). 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 May 1, 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 May 1, 2025.
To help decide which airline to fly from Idaho to Portugal, see what other customers have to say about KLM, United 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.
KLM
7.8
Good
1,334 reviews

Food

7.2

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
KLM
7.8
Good
1,334 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
United Airlines
7.4
Good
8,696 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
American Airlines
7.2
Good
10,000 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Air Canada
7.0
Good
9,254 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.
Lufthansa
6.7
Okay
7,045 reviews
KLM
7.8
Good
1,334 reviews

Food

7.2

Comfort

7.7

Boarding

7.8

Entertainment

7.1

Crew

8.4

Overall

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Mar 2025

LBA - AMS

Overall, the flight from Leeds Bradford to Amsterdam was at expected. The crew were efficient at boarding and professional on board. The only issue was extremely slow check in at Leeds Bradford which was very frustrating.

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 $1,178). 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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$621Average$1,094FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$649Average$1,350FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$654Average$1,042FlexibilityNo cancel feeOn-time77%
DeltaCheapest$654Average$1,173FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$701Average$1,135FlexibilityNo cancel feeOn-time67%
KLMCheapest$814Average$989FlexibilityNo cancel feeOn-time75%

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