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Portugal

$333+ 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 4/8. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Feb 15 — Feb 221
Sun 2/15
Sun 2/22
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 January 16, 2026.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$453
(Iberia)

One-way from

$333
(Ovago)

Popular in

December

Cheapest in

November

Average price

$945
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. 21% potential increase in price ($312 potential increase over avg. RT price).
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Cheapest flight prices on average. 14% potential price decrease ($143 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 16, 2026.

This Iberia deal was found by Cheapflights users on 1/16. 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.
Wed 2/187:00 am
BOI
-
LIS
2 stops24h 50m
Multiple Airlines
Wed 3/48:45 pm
LIS
-
BOI
2 stops23h 03m
Multiple Airlines
Deal found 1/16$453
This Finnair deal was found by Cheapflights users on 1/16. 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.
Tue 4/286:44 am
BOI
-
LIS
2 stops26h 06m
Finnair
Tue 5/54:35 pm
LIS
-
BOI
2 stops37h 03m
Finnair
Deal found 1/16$454
This Finnair deal was found by Cheapflights users on 1/14. 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.
Tue 2/107:20 am
BOI
-
LIS
2 stops25h 05m
Finnair
Tue 2/174:10 pm
LIS
-
BOI
2 stops37h 12m
Finnair
Deal found 1/14$455
This Gurufare deal was found by Cheapflights users on 1/16. 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.
Mon 4/131:29 pm
BOI
-
LIS
2 stops26h 56m
Finnair
Tue 4/216:35 am
LIS
-
BOI
2 stops23h 03m
Finnair
Deal found 1/16$459
This Delta deal was found by Cheapflights users on 1/15. 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 3/23:45 pm
GEG
-
LIS
2 stops33h 15m
Delta
Tue 3/175:30 am
LIS
-
GEG
2 stops38h 41m
Delta
Deal found 1/15$459
This Delta deal was found by Cheapflights users on 1/14. 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 1/275:05 am
GEG
-
LIS
2 stops18h 55m
Delta
Wed 2/410:00 am
LIS
-
GEG
2 stops21h 59m
Delta
Deal found 1/14$462
This United Airlines deal was found by Cheapflights users on 1/16. 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 2/196:25 am
BOI
-
LIS
2 stops18h 45m
United Airlines
Tue 3/310:15 am
LIS
-
BOI
2 stops18h 17m
United Airlines
Deal found 1/16$487
This Gotogate deal was found by Cheapflights users on 1/15. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/245:00 am
GEG
-
LIS
2 stops21h 20m
Multiple Airlines
Thu 11/265:00 am
LIS
-
GEG
2 stops24h 09m
Multiple Airlines
Deal found 1/15$489
This United Airlines deal was found by Cheapflights users on 1/15. 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 4/277:00 am
JAC
-
LIS
2 stops32h 45m
United Airlines
Tue 5/511:25 am
LIS
-
JAC
2 stops40h 37m
United Airlines
Deal found 1/15$495
This United Airlines deal was found by Cheapflights users on 1/16. 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 2/185:24 pm
BOI
-
LIS
2 stops33h 51m
United Airlines
Fri 3/611:55 am
LIS
-
BOI
2 stops29h 11m
United Airlines
Deal found 1/16$497
This Delta deal was found by Cheapflights users on 1/14. 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 4/143:53 pm
BOI
-
LIS
2 stops19h 52m
Delta
Tue 4/285:35 am
LIS
-
BOI
2 stops23h 50m
Delta
Deal found 1/14$499
This United Airlines deal was found by Cheapflights users on 1/13. 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 2/257:00 am
GEG
-
LIS
2 stops19h 15m
United Airlines
Sun 3/15:00 am
LIS
-
GEG
2 stops25h 04m
United Airlines
Deal found 1/13$499

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 January 16, 2026.
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 4/28

6:44 am-3:50 pm

2 stops26h 06m

Lisbon Humberto Delgado

Tue 5/5

4:35 pm-10:38 pm

2 stops37h 03m

$454

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 2/10

7:20 am-3:25 pm

2 stops25h 05m

Lisbon Humberto Delgado

Tue 2/17

4:10 pm-10:22 pm

2 stops37h 12m

$455

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Mon 3/2

3:45 pm-9:00 am

2 stops33h 15m

Lisbon Humberto Delgado

Tue 3/17

5:30 am-1:11 pm

2 stops38h 41m

$459

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 1/27

5:05 am-8:00 am

2 stops18h 55m

Lisbon Humberto Delgado

Wed 2/4

10:00 am-11:59 pm

2 stops21h 59m

$462

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 2/19

6:25 am-10:15 am

2 stops20h 50m

Lisbon Humberto Delgado

Fri 3/6

11:55 am-10:06 am

2 stops29h 11m

$487

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 2/20

6:25 am-10:15 am

2 stops20h 50m

Lisbon Humberto Delgado

Fri 3/6

11:55 am-10:06 am

2 stops29h 11m

$487

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 2/20

6:25 am-10:15 am

2 stops20h 50m

Lisbon Humberto Delgado

Wed 3/4

11:55 am-10:06 am

2 stops29h 11m

$487

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 2/19

6:25 am-8:10 am

2 stops18h 45m

Lisbon Humberto Delgado

Tue 3/3

10:15 am-9:32 pm

2 stops18h 17m

$487

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 2/20

6:25 am-10:15 am

2 stops20h 50m

Lisbon Humberto Delgado

Thu 3/5

11:55 am-10:06 am

2 stops29h 11m

$487

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Mon 4/27

7:00 am-10:45 pm

2 stops32h 45m

Lisbon Humberto Delgado

Tue 5/5

11:25 am-9:02 pm

2 stops40h 37m

$495

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/14

Showing 1-10 of 38 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, February is the cheapest month in which you can book a flight from Idaho to Portugal (average of $546). Flying from Idaho to Portugal in June is currently the most expensive (average of $1,028). 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.

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 $487, Finnair can have you in Portugal from Idaho in 20h 50m. Airlines will cover a distance of 5150 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, February is the cheapest month in which you can book a flight from Idaho to Portugal (average of $546). Flying from Idaho to Portugal in June is currently the most expensive (average of $1,028). 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 January 16, 2026.
AirlineCheapestAverageFlexibilityOn-time
United AirlinesCheapest$601Average$902FlexibilityNo cancel feeOn-time69%
Air CanadaCheapest$602Average$1,181FlexibilityNo cancel feeOn-time67%
American AirlinesCheapest$621Average$1,248FlexibilityNo cancel feeOn-time71%
DeltaCheapest$654Average$1,052FlexibilityNo cancel feeOn-timeN/A

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