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Portugal

$608+ 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
Apr 7 — Apr 141
Mon 4/7
Mon 4/14
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 April 2, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$793
(United)

One-way from

$608
(United)

Popular in

June

Cheapest in

February

Average price

$1,051
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. 18% potential increase in price ($244 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($35 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 2, 2025.

This United Airlines deal was found by Cheapflights users on 4/1. 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 11/84:00 pmGEG - LIS
2 stops34h 15mUnited Airlines
Mon 11/2410:15 amLIS - GEG
2 stops18h 54mUnited Airlines
Deal found 4/1$646
This Air Canada deal was found by Cheapflights users on 4/1. 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.
Sun 11/231:00 pmBOI - LIS
2 stops37h 20mAir Canada
Sat 12/1311:00 amLIS - BOI
2 stops41h 16mAir Canada
Deal found 4/1$650
This United deal was found by Cheapflights users on 4/1. 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 4/95:00 amBOI - LIS
2 stops20h 20mUnited Airlines
Wed 4/1611:25 amLIS - BOI
2 stops40h 57mUnited Airlines
Deal found 4/1$793
This Ovago deal was found by Cheapflights users on 4/1. 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 5/133:39 pmBOI - LIS
2 stops34h 26mScandinavian Airlines
Wed 5/217:15 amLIS - BOI
2 stops23h 13mScandinavian Airlines
Deal found 4/1$862
This Finnair deal was found by Cheapflights users on 3/31. 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.
Fri 10/107:30 amBOI - LIS
2 stops32h 40mFinnair
Thu 10/166:35 amLIS - BOI
2 stops21h 37mFinnair
Deal found 3/31$913
This American Airlines deal was found by Cheapflights users on 4/1. 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 stops25h 42mAmerican Airlines
Thu 5/811:05 amLIS - JAC
2 stops32h 01mAmerican Airlines
Deal found 4/1$945
This Justfly.com deal was found by Cheapflights users on 4/1. 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.
Mon 9/15:43 amGEG - LIS
2 stops43h 37mAir Canada
Tue 9/3011:25 amLIS - GEG
2 stops42h 32mAir Canada
Deal found 4/1$974
This Air Canada deal was found by Cheapflights users on 3/31. 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 9/1810:00 amBOI - LIS
2 stops16h 20mMultiple Airlines
Thu 10/211:25 amLIS - BOI
3 stops29h 18mMultiple Airlines
Deal found 3/31$978
This Gurufare deal was found by Cheapflights users on 4/1. 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 Gurufare is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/128:59 pmBOI - LIS
2 stops41h 21mIcelandair
Thu 9/2510:20 pmLIS - BOI
2 stops31h 25mIcelandair
Deal found 4/1$1,022
This United deal was found by Cheapflights users on 3/31. 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.
Tue 6/108:00 amJAC - LIS
2 stops18h 20mUnited Airlines
Thu 6/1911:25 amLIS - JAC
2 stops37h 30mUnited Airlines
Deal found 3/31$1,158
This Air Canada deal was found by Cheapflights users on 4/1. 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.
Wed 9/2411:21 amGEG - LIS
3 stops21h 09mMultiple Airlines
Tue 10/711:25 amLIS - GEG
2 stops19h 44mMultiple Airlines
Deal found 4/1$1,222
This oojo deal was found by Cheapflights users on 4/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 6/2712:36 pmGEG - LIS
3 stops19h 54mIcelandair
Fri 7/117:10 amLIS - GEG
3 stops21h 59mIcelandair
Deal found 4/1$2,195

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 April 2, 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

Wed 9/24

7:15 am-10:30 am

2 stops19h 15m

Lisbon Humberto Delgado

Tue 10/7

11:25 am-8:29 pm

2 stops41h 04m

$793

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 9/18

10:00 am-9:20 am

2 stops16h 20m

Lisbon Humberto Delgado

Thu 10/2

11:25 am-9:16 pm

2 stops40h 51m

$848

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 5/13

3:39 pm-9:05 am

2 stops34h 26m

Lisbon Humberto Delgado

Wed 5/21

7:15 am-11:28 pm

2 stops23h 13m

$862

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Thu 4/24

12:53 pm-9:35 pm

2 stops25h 42m

Lisbon Humberto Delgado

Thu 5/8

11:05 am-12:06 pm

2 stops32h 01m

$945

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Mon 9/1

5:43 am-9:20 am

2 stops43h 37m

Lisbon Humberto Delgado

Tue 9/30

11:25 am-9:57 pm

2 stops42h 32m

$974

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 9/18

10:00 am-9:20 am

2 stops16h 20m

Lisbon Humberto Delgado

Thu 10/2

11:25 am-9:43 am

3 stops29h 18m

$978

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 9/12

8:59 pm-9:20 pm

2 stops41h 21m

Lisbon Humberto Delgado

Thu 9/25

10:20 pm-10:45 pm

2 stops31h 25m

$1,022

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 5/17

6:30 am-9:20 am

2 stops43h 50m

Lisbon Humberto Delgado

Sun 6/8

1:10 pm-10:57 pm

2 stops40h 47m

$1,143

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Tue 6/10

8:00 am-9:20 am

2 stops18h 20m

Lisbon Humberto Delgado

Thu 6/19

11:25 am-5:55 pm

2 stops37h 30m

$1,158

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 9/24

11:21 am-4:30 pm

3 stops21h 09m

Lisbon Humberto Delgado

Tue 10/7

11:25 am-11:09 pm

2 stops19h 44m

$1,222

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/1

Showing 1-10 of 13 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.

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 $1,203). 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 April 2, 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 April 2, 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
8,615 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.0

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
8,615 reviews
United Airlines
7.4
Good
8,615 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.0

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??
Scandinavian Airlines
7.3
Good
1,328 reviews
United Airlines
7.4
Good
8,615 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.0

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??
American Airlines
7.2
Good
10,000 reviews
United Airlines
7.4
Good
8,615 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.0

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??
Air Canada
7.0
Good
9,022 reviews
United Airlines
7.4
Good
8,615 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.0

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??
Icelandair
7.0
Good
476 reviews
United Airlines
7.4
Good
8,615 reviews

Boarding

7.7

Food

6.6

Overall

7.4

Crew

8.1

Comfort

7.3

Entertainment

7.0

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

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 $1,203). 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 April 2, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$618Average$1,372FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$621Average$1,094FlexibilityNo cancel feeOn-time71%
Air FranceCheapest$654Average$1,042FlexibilityNo cancel feeOn-time77%
DeltaCheapest$654Average$1,222FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$701Average$1,135FlexibilityNo cancel feeOn-time67%
KLMCheapest$814Average$989FlexibilityNo cancel feeOn-time75%

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