Portugal

$462+ 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 3/24. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Apr 8 — Apr 151
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Cheap 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 March 9, 2026.

This Finnair deal was found by Cheapflights users on 3/4. 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 Finnair 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 41m
Multiple Airlines
Tue 4/214:35 pm
LIS
-
BOI
2 stops37h 19m
Multiple Airlines
Deal found 3/4$514
This Delta deal was found by Cheapflights users on 3/5. 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 4/203:44 pm
BOI
-
LIS
2 stops19h 06m
Delta
Wed 4/295:00 am
LIS
-
BOI
2 stops25h 00m
Delta
Deal found 3/5$571
This Air France deal was found by Cheapflights users on 3/5. 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.
Tue 12/15:40 am
BOI
-
LIS
2 stops19h 20m
Air France
Sun 12/66:30 pm
LIS
-
BOI
2 stops31h 03m
Air France
Deal found 3/5$591
This Delta deal was found by Cheapflights users on 3/4. 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.
Tue 10/132:35 pm
BOI
-
LIS
2 stops20h 15m
Delta
Thu 10/225:00 am
LIS
-
BOI
2 stops25h 52m
Delta
Deal found 3/4$601
This Delta deal was found by Cheapflights users on 3/4. 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.
Tue 10/1312:42 pm
BOI
-
LIS
2 stops22h 08m
Delta
Wed 10/285:30 am
LIS
-
BOI
2 stops24h 22m
Delta
Deal found 3/4$608
This FlightHub deal was found by Cheapflights users on 3/7. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/213:30 pm
BOI
-
LIS
2 stops34h 30m
Scandinavian Airlines
Wed 8/266:15 pm
LIS
-
BOI
2 stops35h 49m
Scandinavian Airlines
Deal found 3/7$613
This Delta deal was found by Cheapflights users on 3/4. 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.
Mon 10/1211:30 pm
BOI
-
LIS
2 stops28h 15m
Delta
Thu 10/225:00 am
LIS
-
BOI
2 stops25h 52m
Delta
Deal found 3/4$626
This KAYAK deal was found by Cheapflights users on 3/6. 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.
Fri 4/176:00 am
BOI
-
LIS
2 stops21h 45m
Multiple Airlines
Fri 4/2410:00 am
LIS
-
BOI
2 stops30h 53m
Multiple Airlines
Deal found 3/6$631
This Delta deal was found by Cheapflights users on 3/4. 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.
Mon 10/1211:30 pm
BOI
-
LIS
2 stops28h 15m
Delta
Wed 10/285:30 am
LIS
-
BOI
2 stops24h 22m
Delta
Deal found 3/4$633
This Delta deal was found by Cheapflights users on 3/4. 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.
Mon 10/1211:30 pm
BOI
-
LIS
2 stops28h 15m
Delta
Tue 10/275:30 am
LIS
-
BOI
2 stops23h 38m
Delta
Deal found 3/4$634
This KLM deal was found by Cheapflights users on 3/4. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/143:30 pm
GEG
-
LIS
2 stops19h 15m
KLM
Tue 4/289:20 am
LIS
-
GEG
2 stops17h 37m
KLM
Deal found 3/4$641
This Delta deal was found by Cheapflights users on 3/4. 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.
Tue 4/141:52 pm
BOI
-
LIS
2 stops21h 53m
Delta
Tue 4/285:00 am
LIS
-
BOI
2 stops25h 00m
Delta
Deal found 3/4$642

Find flight deals from Idaho to Portugal

Keep the following information in mind while searching for Idaho to Portugal flight deals. Data was last updated March 9, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$571
(Delta)

One-way from

$462
(Air France)

Popular in

December

Cheapest in

April

Average price

$691
Provider with most accurate pricing for Boise Air Term. Gowen Fld-Lisbon Humberto Delgado flight deals.
Provider most trusted by Cheapflights users for Boise Air Term. Gowen Fld-Lisbon Humberto Delgado flights.
From Idaho to Portugal
One-way flight from Idaho to Portugal
Highest demand for flights based on searches. 36% potential increase in price ($602 potential increase over avg. RT price).
Cheapest flight prices on average. 18% potential price decrease ($164 potential savings vs. average RT price).
Average for round-trip flights in March 2026

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 March 9, 2026.
Use the filters below to find and compare flights from Idaho to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Mon 4/13

1:29 pm-11:10 pm

2 stops26h 41m

Lisbon Humberto Delgado

Tue 4/21

4:35 pm-10:54 pm

2 stops37h 19m

$514

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 4/14

3:30 pm-6:45 pm

2 stops19h 15m

Lisbon Humberto Delgado

Tue 4/28

9:20 am-6:57 pm

2 stops17h 37m

$641

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 4/14

1:52 pm-6:45 pm

2 stops21h 53m

Lisbon Humberto Delgado

Tue 4/28

5:00 am-11:00 pm

2 stops25h 00m

$642

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 4/14

11:25 am-6:45 pm

2 stops23h 20m

Lisbon Humberto Delgado

Tue 4/28

5:00 am-9:02 pm

2 stops24h 02m

$690

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Wed 4/22

8:30 am-2:55 pm

2 stops23h 25m

Lisbon Humberto Delgado

Wed 5/13

5:00 am-8:34 pm

2 stops22h 34m

$737

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Fri 4/24

4:01 pm-8:20 am

2 stops32h 19m

Lisbon Humberto Delgado

Sat 5/9

5:05 am-6:36 pm

2 stops21h 31m

$748

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Wed 4/22

8:30 am-2:55 pm

2 stops23h 25m

Lisbon Humberto Delgado

Wed 4/29

5:00 am-4:14 pm

2 stops18h 14m

$769

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 4/14

3:44 pm-6:45 pm

2 stops20h 01m

Lisbon Humberto Delgado

Tue 4/28

9:20 am-10:24 pm

2 stops20h 04m

$774

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Mon 3/23

4:16 pm-10:15 am

2 stops35h 59m

Lisbon Humberto Delgado

Thu 4/2

12:20 pm-11:17 am

2 stops29h 57m

$807

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 4/16

12:30 pm-11:05 am

2 stops39h 35m

Lisbon Humberto Delgado

Thu 4/23

11:25 am-10:03 pm

2 stops41h 38m

$814

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/5

Showing 1-10 of 35 resultsSorted by cheapest first
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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
No data available for this route at this time. Please check back soon.

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 $641, KLM can have you in Portugal from Idaho in 19h 15m. 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.

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.

Top 2 airlines flying from Idaho to Portugal

Discover the top 2 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 March 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$549Average$824FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$589Average$938FlexibilityNo cancel feeOn-time69%

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