Portugal

$367+ 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 12/30. Fares are subject to change and may not be available on all flights or dates of travel.
BOI — LIS
Aug 3 — Aug 101
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Idaho to Portugal with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 July 4, 2026.

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 12/17:00 am
JAC
-
LIS
2 stops18h 10m
United Airlines
Thu 12/310:55 am
LIS
-
JAC
2 stops41h 07m
United Airlines
Deal found 7/2$726
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.
Sun 12/67:00 am
BOI
-
LIS
2 stops18h 10m
United Airlines
Wed 12/911:20 am
LIS
-
BOI
2 stops43h 39m
United Airlines
Deal found 7/2$726
This Air France 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/181:10 pm
JAC
-
LIS
2 stops21h 20m
Multiple Airlines
Mon 11/303:35 pm
LIS
-
JAC
2 stops31h 54m
Multiple Airlines
Deal found 7/1$775
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 12/295:00 am
GEG
-
LIS
2 stops19h 10m
United Airlines
Fri 1/85:00 am
LIS
-
GEG
2 stops24h 09m
United Airlines
Deal found 7/2$786
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.
Wed 9/305:00 am
GEG
-
LIS
2 stops20h 20m
United Airlines
Fri 10/2311:25 am
LIS
-
GEG
2 stops39h 06m
United Airlines
Deal found 7/3$809
This Delta deal was found by Cheapflights users on 6/30. 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 12/297:55 am
GEG
-
LIS
2 stops23h 15m
Delta
Sat 1/95:00 am
LIS
-
GEG
2 stops22h 27m
Delta
Deal found 6/30$846
This FlightHub deal was found by Cheapflights users on 6/29. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/171:40 pm
GEG
-
LIS
2 stops37h 25m
Multiple Airlines
Sat 10/246:15 am
LIS
-
GEG
2 stops22h 34m
Multiple Airlines
Deal found 6/29$850
This Delta deal was found by Cheapflights users on 6/29. 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.
Thu 10/83:36 pm
BOI
-
LIS
2 stops19h 14m
Delta
Fri 10/165:00 am
LIS
-
BOI
2 stops24h 08m
Delta
Deal found 6/29$879
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.
Thu 10/158:22 am
BOI
-
LIS
2 stops19h 53m
Delta
Sat 10/245:00 am
LIS
-
BOI
2 stops20h 33m
Delta
Deal found 7/3$885
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 9/281:00 pm
GEG
-
LIS
2 stops20h 50m
Delta
Sat 10/105:35 am
LIS
-
GEG
2 stops23h 36m
Delta
Deal found 7/3$886
This FlightHub deal was found by Cheapflights users on 6/30. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/810:34 am
BOI
-
LIS
2 stops29h 41m
Scandinavian Airlines
Sat 9/1910:55 pm
LIS
-
BOI
2 stops26h 44m
Scandinavian Airlines
Deal found 6/30$907
This United Airlines deal was found by Cheapflights users on 6/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/14:25 pm
JAC
-
LIS
2 stops23h 20m
United Airlines
Wed 9/1611:25 am
LIS
-
JAC
2 stops40h 15m
United Airlines
Deal found 6/30$932

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 July 4, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$726
(United Airlines)

One-way from

$367
(United Airlines)

Popular in

December

Cheapest in

November
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. 37% potential increase in price ($618 potential increase over avg. RT price).
Cheapest flight prices on average. 21% potential price decrease ($183 potential savings vs. average RT price).

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 4, 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

JacksonLisbon

JAC - LIS

JACLIS

Jackson Hole

Tue 12/1

7:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Thu 12/3

10:55 am-9:02 pm

2 stops41h 07m

$726

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sun 12/6

7:00 am-8:10 am

2 stops18h 10m

Lisbon Humberto Delgado

Wed 12/9

11:20 am-11:59 pm

2 stops43h 39m

$726

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 12/29

9:10 am-11:20 am

2 stops18h 10m

Lisbon Humberto Delgado

Fri 1/8

5:00 am-7:27 pm

2 stops22h 27m

$786

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 12/29

5:00 am-8:10 am

2 stops19h 10m

Lisbon Humberto Delgado

Fri 1/8

5:00 am-9:09 pm

2 stops24h 09m

$786

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Tue 12/29

7:55 am-3:10 pm

2 stops23h 15m

Lisbon Humberto Delgado

Sat 1/9

5:00 am-7:27 pm

2 stops22h 27m

$846

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Sat 10/17

1:40 pm-11:05 am

2 stops37h 25m

Lisbon Humberto Delgado

Sat 10/24

6:15 am-8:49 pm

2 stops22h 34m

$850

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 10/8

3:36 pm-5:50 pm

2 stops19h 14m

Lisbon Humberto Delgado

Fri 10/16

5:00 am-10:08 pm

2 stops24h 08m

$879
Quickest round-trip

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 10/15

8:22 am-11:15 am

2 stops19h 53m

Lisbon Humberto Delgado

Sat 10/24

5:00 am-6:33 pm

2 stops20h 33m

$885

SpokaneLisbon

GEG - LIS

GEGLIS

Spokane

Mon 9/28

1:00 pm-5:50 pm

2 stops20h 50m

Lisbon Humberto Delgado

Sat 10/10

5:35 am-9:11 pm

2 stops23h 36m

$886

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 9/8

12:14 pm-11:15 pm

2 stops28h 01m

Lisbon Humberto Delgado

Sat 9/19

10:55 pm-6:39 pm

2 stops26h 44m

$907

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 35 resultsSorted by cheapest first
1
2
3
4

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 $726, United Airlines can have you in Portugal from Idaho in 18h 10m. Airlines will cover a distance of 4932 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 July 4, 2026.
AirlineCheapestAverageFlexibilityOn-time
DeltaCheapest$549Average$827FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$618Average$937FlexibilityNo cancel feeOn-time69%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.