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Portugal

$335+ 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 2/25. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
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 October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$500
(Delta)

One-way from

$335
(United Airlines)

Popular in

June

Cheapest in

November

Average price

$879
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 ($247 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($42 potential savings vs. average RT price).
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Average for round-trip flights in October 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 October 30, 2025.

This Delta deal was found by Cheapflights users on 10/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/28:45 amBOI - LIS
2 stops23h 25mDelta
Wed 12/105:00 amLIS - BOI
2 stops24h 16mDelta
Deal found 10/30$500
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/311:19 amGEG - LIS
2 stops19h 51mDelta
Sun 12/711:25 amLIS - GEG
2 stops41h 31mDelta
Deal found 10/29$500
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/89:00 amBOI - LIS
2 stops23h 10mDelta
Tue 12/165:30 amLIS - BOI
2 stops21h 50mDelta
Deal found 10/29$506
This Air France deal was found by Cheapflights users on 10/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/276:00 amGEG - LIS
2 stops18h 00mMultiple Airlines
Wed 12/105:00 amLIS - GEG
2 stops17h 55mMultiple Airlines
Deal found 10/29$538
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Tue 12/26:35 amBOI - LIS
2 stops19h 45mUnited Airlines
Wed 12/1011:00 amLIS - BOI
2 stops43h 44mUnited Airlines
Deal found 10/29$539
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Thu 12/45:25 amGEG - LIS
2 stops19h 55mUnited Airlines
Sun 12/710:50 amLIS - GEG
2 stops42h 09mUnited Airlines
Deal found 10/29$539
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Wed 12/37:00 amGEG - LIS
2 stops19h 15mUnited Airlines
Tue 12/95:00 amLIS - GEG
2 stops21h 44mUnited Airlines
Deal found 10/29$541
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Mon 12/111:25 amGEG - LIS
2 stops14h 50mUnited Airlines
Sun 12/710:50 amLIS - GEG
2 stops42h 09mUnited Airlines
Deal found 10/29$543
This Air Canada deal was found by Cheapflights users on 10/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:33 pmGEG - LIS
2 stops36h 47mAir Canada
Fri 12/1211:20 amLIS - GEG
2 stops39h 24mAir Canada
Deal found 10/29$544
This Air Canada deal was found by Cheapflights users on 10/29. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/25:25 amGEG - LIS
2 stops43h 30mAir Canada
Mon 12/811:20 amLIS - GEG
2 stops39h 24mAir Canada
Deal found 10/29$545
This KAYAK deal was found by Cheapflights users on 10/29. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/312:33 pmGEG - LIS
2 stops26h 57mLufthansa
Wed 12/105:00 amLIS - GEG
2 stops23h 59mLufthansa
Deal found 10/29$548
This Delta deal was found by Cheapflights users on 10/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/15:00 amGEG - LIS
2 stops26h 10mDelta
Tue 12/95:00 amLIS - GEG
2 stops27h 11mDelta
Deal found 10/29$549

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 October 30, 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

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Fri 1/16

7:20 am-5:30 pm

2 stops27h 10m

Lisbon Humberto Delgado

Tue 1/20

11:25 am-4:26 pm

2 stops36h 01m

$500

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 1/14

11:22 am-3:10 pm

2 stops19h 48m

Lisbon Humberto Delgado

Wed 2/11

5:00 am-7:59 pm

2 stops22h 59m

$500

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Mon 12/8

9:00 am-3:10 pm

2 stops23h 10m

Lisbon Humberto Delgado

Tue 12/16

5:00 am-10:16 pm

2 stops24h 16m

$500

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 12/3

11:19 am-3:10 pm

2 stops19h 51m

Lisbon Humberto Delgado

Sun 12/7

11:25 am-8:56 pm

2 stops41h 31m

$500

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 12/2

6:35 am-9:20 am

2 stops19h 45m

Lisbon Humberto Delgado

Wed 12/10

11:00 am-11:44 pm

2 stops43h 44m

$539

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 1/24

8:15 am-8:55 am

2 stops17h 40m

Lisbon Humberto Delgado

Mon 2/2

11:20 am-1:35 pm

2 stops33h 15m

$539

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Thu 12/4

5:25 am-9:20 am

2 stops19h 55m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-8:59 pm

2 stops42h 09m

$539

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 12/3

7:00 am-10:15 am

2 stops19h 15m

Lisbon Humberto Delgado

Tue 12/9

5:00 am-6:44 pm

2 stops21h 44m

$541

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Mon 12/1

11:25 am-10:15 am

2 stops14h 50m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-8:59 pm

2 stops42h 09m

$543

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Wed 12/3

5:25 am-10:15 am

2 stops20h 50m

Lisbon Humberto Delgado

Sun 12/7

10:50 am-8:59 pm

2 stops42h 09m

$543

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 44 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, December is the cheapest month in which you can book a flight from Idaho to Portugal (average of $567). Flying from Idaho to Portugal in June is currently the most expensive (average of $1,104). 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 October 30, 2025.

One of the essential ways to save on airfare from Idaho to Portugal is to remain as flexible as possible. Flights that are in the morning tend to be the most expensive. A flight in the afternoon could potentially save you up to 30% on airfare.

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.

  • How long is the flight from Idaho to Portugal?

    For as low as $539, Delta can have you in Portugal from Idaho in 17h 40m. Airlines will cover a distance of 5150 mi. Both multi-stop and nonstop flights can be found to your destination and back.

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

    For one-way options, check prices for United Airlines. According to our data, you can fly for as low as $335. Users have also found prices from $438 and $447 on Air Canada 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, December is the cheapest month in which you can book a flight from Idaho to Portugal (average of $567). Flying from Idaho to Portugal in June is currently the most expensive (average of $1,104). 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

Browse thousands of different options on Cheapflights for your next trip

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$601Average$1,055FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$602Average$1,181FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$621Average$1,248FlexibilityNo cancel feeOn-time71%
DeltaCheapest$654Average$1,040FlexibilityNo cancel feeOn-timeN/A

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