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$327+ 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 12/4. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
dic. 4 — dic. 111
jue. 12/4
jue. 12/11
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 noviembre 4, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$483
(Mytrip)

One-way from

$327
(Travelocity)

Popular in

June

Cheapest in

November

Average price

$668
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 November 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 noviembre 4, 2025.

This Delta deal was found by Cheapflights users on 11/4. 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.
mar. 12/27:30 amBOI - LIS
2 stops20h 50mDelta
mié. 12/105:00 amLIS - BOI
2 stops18h 02mDelta
Deal found 11/4$500
This Air France deal was found by Cheapflights users on 11/4. 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.
mar. 12/26:00 amGEG - LIS
2 stops18h 00mMultiple Airlines
lun. 12/83:30 pmLIS - GEG
2 stops31h 25mMultiple Airlines
Deal found 11/4$501
This Delta deal was found by Cheapflights users on 11/3. 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.
lun. 12/85:35 amBOI - LIS
2 stops20h 25mDelta
mar. 12/1610:00 amLIS - BOI
2 stops21h 42mDelta
Deal found 11/3$510
This Virgin Atlantic deal was found by Cheapflights users on 11/3. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 12/36:00 amGEG - LIS
2 stops18h 00mVirgin Atlantic
dom. 12/711:15 amLIS - GEG
2 stops20h 44mVirgin Atlantic
Deal found 11/3$510
This Air Canada deal was found by Cheapflights users on 11/4. 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.
mar. 12/28:17 amBOI - LIS
3 stops18h 03mMultiple Airlines
mié. 12/1011:00 amLIS - BOI
2 stops32h 17mMultiple Airlines
Deal found 11/4$545
This Cheapflightsfares deal was found by Cheapflights users on 11/3. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/1112:45 pmGEG - LIS
2 stops26h 45mLufthansa
mar. 11/185:00 amLIS - GEG
2 stops23h 45mLufthansa
Deal found 11/3$553
This KLM deal was found by Cheapflights users on 11/3. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 12/41:12 pmGEG - FAO
2 stops43h 43mKLM
lun. 12/87:15 pmFAO - GEG
2 stops32h 55mKLM
Deal found 11/3$553
This United Airlines deal was found by Cheapflights users on 11/4. 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.
mar. 12/25:25 amGEG - LIS
2 stops18h 45mUnited Airlines
lun. 12/86:10 amLIS - GEG
3 stops22h 49mUnited Airlines
Deal found 11/4$563
This Finnair deal was found by Cheapflights users on 11/3. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 12/166:44 amBOI - LIS
2 stops19h 21mMultiple Airlines
mié. 1/144:10 pmLIS - BOI
2 stops34h 15mMultiple Airlines
Deal found 11/3$629
This United Airlines deal was found by Cheapflights users on 11/4. 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.
mar. 11/412:45 pmBOI - LIS
2 stops14h 30mUnited Airlines
mar. 11/185:00 amLIS - BOI
2 stops23h 36mUnited Airlines
Deal found 11/4$725
This Air France deal was found by Cheapflights users on 11/2. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/41:39 pmBOI - LIS
2 stops18h 31mMultiple Airlines
mar. 11/185:00 amLIS - BOI
2 stops18h 05mMultiple Airlines
Deal found 11/2$774
This Air France deal was found by Cheapflights users on 11/2. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/111:16 pmGEG - LIS
2 stops20h 14mMultiple Airlines
mar. 11/185:00 amLIS - GEG
2 stops21h 58mMultiple Airlines
Deal found 11/2$774

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 noviembre 4, 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

sáb. 1/24

7:20 am-9:05 am

2 stops18h 45m

Lisbon Humberto Delgado

lun. 2/2

4:10 pm-7:25 pm

2 stops34h 15m

$499

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

mar. 12/2

5:20 am-11:20 am

2 stops23h 00m

Lisbon Humberto Delgado

mié. 12/10

5:00 am-4:02 pm

2 stops18h 02m

$500

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

mié. 12/3

2:15 pm-8:00 am

2 stops33h 45m

Lisbon Humberto Delgado

dom. 12/7

11:25 am-8:10 pm

2 stops40h 45m

$501

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

vie. 1/16

12:58 pm-11:10 pm

2 stops27h 12m

Lisbon Humberto Delgado

mar. 1/20

11:25 am-4:26 pm

2 stops36h 01m

$506

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

vie. 1/16

12:58 pm-2:35 pm

2 stops18h 37m

Lisbon Humberto Delgado

mar. 1/20

11:25 am-12:00 pm

2 stops55h 35m

$506

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

mié. 12/3

6:00 am-8:00 am

2 stops18h 00m

Lisbon Humberto Delgado

dom. 12/7

11:15 am-11:59 pm

2 stops20h 44m

$510

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

lun. 12/8

5:20 am-9:00 am

2 stops20h 40m

Lisbon Humberto Delgado

mar. 12/16

10:00 am-12:09 am

2 stops21h 09m

$510

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

mar. 12/2

8:17 am-9:20 am

3 stops18h 03m

Lisbon Humberto Delgado

mié. 12/10

11:00 am-12:17 pm

2 stops32h 17m

$545

SpokaneFaro

GEG - FAO

GEGFAO

Spokane

jue. 12/4

1:12 pm-4:55 pm

2 stops43h 43m

Faro

lun. 12/8

7:15 pm-8:10 pm

2 stops32h 55m

$553

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

mar. 12/2

5:25 am-8:10 am

2 stops18h 45m

Lisbon Humberto Delgado

lun. 12/8

6:10 am-8:59 pm

3 stops22h 49m

$563

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/4

Showing 1-10 of 42 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 noviembre 4, 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 $510, Delta can have you in Portugal from Idaho in 18h. Airlines will cover a distance of 5022 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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

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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 noviembre 4, 2025.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$601Average$1,062FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$602Average$1,181FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$621Average$1,248FlexibilityNo cancel feeOn-time71%
DeltaCheapest$654Average$1,045FlexibilityNo cancel feeOn-timeN/A

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