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Portugal

$449+ 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 10/2. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Jul 8 — Jul 151
Tue 7/8
Tue 7/15
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 July 3, 2025.

Round-trip from

$587
(United Airlines)

One-way from

$449
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$1,061
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. 15% potential increase in price ($198 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 July 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 July 3, 2025.

This United Airlines deal was found by Cheapflights users on 7/2. 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 10/217:00 amBOI - LIS
2 stops18h 20mUnited Airlines
Thu 11/610:55 amLIS - BOI
2 stops43h 00mUnited Airlines
Deal found 7/2$587
This Booking.com deal was found by Cheapflights users on 7/3. 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.
Wed 11/196:20 amBOI - LIS
2 stops19h 35mMultiple Airlines
Thu 11/275:00 amLIS - BOI
2 stops23h 21mMultiple Airlines
Deal found 7/3$597
This Finnair deal was found by Cheapflights users on 7/2. 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 11/25:52 amGEG - LIS
2 stops19h 03mMultiple Airlines
Thu 11/2010:55 amLIS - GEG
2 stops20h 06mMultiple Airlines
Deal found 7/2$613
This United Airlines deal was found by Cheapflights users on 7/1. 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.
Wed 12/35:00 amGEG - LIS
2 stops19h 10mUnited Airlines
Sun 12/710:50 amLIS - GEG
2 stops42h 12mUnited Airlines
Deal found 7/1$643
This United Airlines deal was found by Cheapflights users on 7/3. 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 10/184:07 pmJAC - LIS
2 stops34h 13mUnited Airlines
Mon 11/310:15 amLIS - JAC
2 stops17h 22mUnited Airlines
Deal found 7/3$665
This Delta deal was found by Cheapflights users on 7/3. 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.
Sat 10/1811:41 amBOI - LIS
2 stops23h 14mDelta
Sat 11/15:30 amLIS - BOI
2 stops24h 29mDelta
Deal found 7/3$736
This Cheapflightsfares deal was found by Cheapflights users on 7/1. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/2412:35 pmGEG - LIS
2 stops25h 15mLufthansa
Tue 10/75:05 amLIS - GEG
2 stops26h 10mLufthansa
Deal found 7/1$795
This Delta deal was found by Cheapflights users on 7/2. 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.
Sun 9/287:30 amJAC - LIS
2 stops17h 30mDelta
Sun 10/55:40 amLIS - JAC
2 stops22h 19mDelta
Deal found 7/2$841
This Finnair deal was found by Cheapflights users on 7/1. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/226:59 amBOI - LIS
2 stops33h 11mFinnair
Tue 10/77:15 amLIS - BOI
2 stops22h 00mFinnair
Deal found 7/1$846
This Air Canada deal was found by Cheapflights users on 7/3. 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.
Mon 12/225:22 pmBOI - LIS
2 stops56h 33mAir Canada
Sat 1/311:20 amLIS - BOI
2 stops40h 48mAir Canada
Deal found 7/3$943
This Delta deal was found by Cheapflights users on 7/3. 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.
Mon 9/17:30 amGEG - LIS
2 stops23h 05mDelta
Tue 9/3010:00 amLIS - GEG
2 stops22h 03mDelta
Deal found 7/3$945
This Iberia deal was found by Cheapflights users on 7/1. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/116:00 amGEG - LIS
2 stops30h 05mIberia
Tue 9/236:35 amLIS - GEG
2 stops37h 10mIberia
Deal found 7/1$1,044

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 July 3, 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

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 10/21

7:00 am-8:20 am

2 stops18h 20m

Lisbon Humberto Delgado

Thu 11/6

10:55 am-10:55 pm

2 stops43h 00m

$587

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Wed 11/19

6:20 am-8:55 am

2 stops19h 35m

Lisbon Humberto Delgado

Thu 11/27

5:00 am-9:21 pm

2 stops23h 21m

$597

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Sun 11/2

5:52 am-8:55 am

2 stops19h 03m

Lisbon Humberto Delgado

Thu 11/20

10:55 am-11:01 pm

2 stops20h 06m

$613

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 12/3

5:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-9:02 pm

2 stops42h 12m

$643

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Sat 10/18

4:07 pm-9:20 am

2 stops34h 13m

Lisbon Humberto Delgado

Mon 11/3

10:15 am-8:37 pm

2 stops17h 22m

$665

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 10/18

11:41 am-5:55 pm

2 stops23h 14m

Lisbon Humberto Delgado

Sat 11/1

5:30 am-11:59 pm

2 stops24h 29m

$736

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 9/24

12:35 pm-9:50 pm

2 stops25h 15m

Lisbon Humberto Delgado

Tue 10/7

5:05 am-11:15 pm

2 stops26h 10m

$795

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Sun 9/28

7:30 am-8:00 am

2 stops17h 30m

Lisbon Humberto Delgado

Sun 10/5

5:40 am-8:59 pm

2 stops22h 19m

$841

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Mon 9/22

6:59 am-11:10 pm

2 stops33h 11m

Lisbon Humberto Delgado

Tue 10/7

7:15 am-10:15 pm

2 stops22h 00m

$846

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Mon 12/22

5:22 pm-8:55 am

2 stops56h 33m

Lisbon Humberto Delgado

Sat 1/3

11:20 am-9:08 pm

2 stops40h 48m

$943

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/1

Showing 1-10 of 22 results
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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 $1,130). 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 July 3, 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.

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 July 3, 2025.
Read reviews from past customers who have flown Delta, Finnair, and Air France from Idaho to Portugal. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Finnair
7.6
Good
1,306 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,465 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
American Airlines
7.2
Good
10,000 reviews
Delta
8.0
Very good
7,982 reviews

Comfort

7.9

Crew

8.5

Boarding

8.2

Overall

8.0

Entertainment

7.9

Food

7.3

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • What are the cheapest airlines to fly from Idaho to Portugal one-way?

    For one-way options, check prices for Air Canada. According to our data, you can fly for as low as $583. Users have also found prices from $597 and $632 on United Airlines and Air France, respectively.

  • 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 $1,130). 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 4 airlines flying from Idaho to Portugal

Discover the top 4 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 July 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$601Average$1,294FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$613Average$1,094FlexibilityNo cancel feeOn-time71%
DeltaCheapest$654Average$1,227FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$701Average$1,181FlexibilityNo cancel feeOn-time67%

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