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Cheap flights from Boise to Portugal from $438

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Boise to Portugal departing on 3/24. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Boise to Portugal

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:15 am - 9:20 amBOI-LIS
20h 05m2 stops
United Airlines Logo
10:55 am - 10:45 pmLIS-BOI
42h 50m2 stops
$532United Airlines
Find Deal
Thu, Nov 27 - Thu, Dec 4
United Airlines Logo
6:35 am - 10:15 amBOI-LIS
20h 40m2 stops
United Airlines Logo
11:20 am - 12:17 pmLIS-BOI
31h 57m2 stops
$537United Airlines
Find Deal
Mon, Dec 8 - Tue, Dec 16
Multiple Airlines Logo
5:35 am - 8:00 amBOI-LIS
19h 25m2 stops
Multiple Airlines Logo
5:00 am - 4:02 pmLIS-BOI
18h 02m2 stops
$538Multiple Airlines
Find Deal
Thu, Nov 27 - Wed, Dec 10
United Airlines Logo
1:50 pm - 8:55 amBOI-LIS
36h 05m2 stops
United Airlines Logo
11:00 am - 11:44 pmLIS-BOI
43h 44m2 stops
$545United Airlines
Find Deal
Tue, Dec 2 - Wed, Dec 10
Multiple Airlines Logo
7:33 am - 8:55 amBOI-LIS
19h 22m2 stops
Multiple Airlines Logo
4:35 pm - 9:15 pmLIS-BOI
35h 40m2 stops
$554Multiple Airlines
Find Deal
Sun, Mar 8 - Mon, Mar 30
Delta Logo
9:00 am - 3:10 pmBOI-LIS
23h 10m2 stops
Delta Logo
5:30 am - 10:05 pmLIS-BOI
23h 35m2 stops
$555Delta
Find Deal
Mon, Dec 8 - Tue, Dec 16
Scandinavian Airlines Logo
3:54 pm - 8:55 amBOI-LIS
34h 01m2 stops
Scandinavian Airlines Logo
7:05 am - 10:05 pmLIS-BOI
22h 00m2 stops
$598Scandinavian Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Scandinavian Airlines Logo
3:54 pm - 8:55 amBOI-LIS
34h 01m2 stops
Scandinavian Airlines Logo
7:05 am - 10:05 pmLIS-BOI
22h 00m2 stops
$688Scandinavian Airlines
Find Deal
Sat, Dec 6 - Wed, Dec 10
Air Canada Logo
5:17 pm - 9:20 amBOI-LIS
33h 03m2 stops
Air Canada Logo
10:55 am - 6:54 pmLIS-BOI
38h 59m2 stops
$698Air Canada
Find Deal
Sun, Nov 2 - Thu, Nov 13
Air Canada Logo
8:17 am - 9:20 amBOI-LIS
18h 03m3 stops
Air Canada Logo
11:20 am - 11:39 amLIS-BOI
31h 19m3 stops
$1,064Air Canada
Find Deal
Tue, Nov 4 - Tue, Nov 18

United Airlines flights from Boise to Portugal

Our best United Airlines deals on Boise to Portugal flight tickets
United Airlines
Nov 27
BOI6:15 amBoise Air Term. Gowen Fld
20h 05m
2 stops
LIS9:20 amLisbon Humberto Delgado
Dec 4
LIS10:55 amLisbon Humberto Delgado
42h 50m
2 stops
BOI10:45 pmBoise Air Term. Gowen Fld
$532
Find similar
United Airlines
Dec 8
BOI6:35 amBoise Air Term. Gowen Fld
20h 40m
2 stops
LIS10:15 amLisbon Humberto Delgado
Dec 16
LIS11:20 amLisbon Humberto Delgado
31h 57m
2 stops
BOI12:17 pmBoise Air Term. Gowen Fld
$537
Find similar
United Airlines
Dec 2
BOI1:50 pmBoise Air Term. Gowen Fld
36h 05m
2 stops
LIS8:55 amLisbon Humberto Delgado
Dec 10
LIS11:00 amLisbon Humberto Delgado
43h 44m
2 stops
BOI11:44 pmBoise Air Term. Gowen Fld
$545
Find similar

Delta flights from Boise to Portugal

Our best Delta deals on Boise to Portugal flight tickets
Delta
Dec 8
BOI9:00 amBoise Air Term. Gowen Fld
23h 10m
2 stops
LIS3:10 pmLisbon Humberto Delgado
Dec 16
LIS5:30 amLisbon Humberto Delgado
23h 35m
2 stops
BOI10:05 pmBoise Air Term. Gowen Fld
$555
Find similar
Delta
Oct 18
BOI8:55 amBoise Air Term. Gowen Fld
22h 55m
2 stops
LIS2:50 pmLisbon Humberto Delgado
Nov 1
LIS5:30 amLisbon Humberto Delgado
16h 52m
2 stops
BOI4:22 pmBoise Air Term. Gowen Fld
$877
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Boise 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, momondo users made 832,500 searches. Data last updated October 14, 2025.
Use the filters below to find and compare flights from Boise to Portugal that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 11/27

6:15 am-9:20 am

2 stops20h 05m

Lisbon Humberto Delgado

Thu 12/4

10:55 am-10:45 pm

2 stops42h 50m

$532

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Mon 12/8

6:35 am-10:15 am

2 stops20h 40m

Lisbon Humberto Delgado

Tue 12/16

11:20 am-12:17 pm

2 stops31h 57m

$537

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 11/27

5:35 am-8:00 am

2 stops19h 25m

Lisbon Humberto Delgado

Wed 12/10

5:00 am-4:02 pm

2 stops18h 02m

$538

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 12/2

1:50 pm-8:55 am

2 stops36h 05m

Lisbon Humberto Delgado

Wed 12/10

11:00 am-11:44 pm

2 stops43h 44m

$545

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sun 3/8

7:33 am-8:55 am

2 stops19h 22m

Lisbon Humberto Delgado

Mon 3/30

4:35 pm-9:15 pm

2 stops35h 40m

$554

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

5:30 am-10:05 pm

2 stops23h 35m

$555

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 12/6

3:54 pm-8:55 am

2 stops34h 01m

Lisbon Humberto Delgado

Wed 12/10

7:05 am-10:05 pm

2 stops22h 00m

$598

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 12/6

3:54 pm-8:55 am

2 stops34h 01m

Lisbon Humberto Delgado

Wed 12/10

7:05 am-10:05 pm

2 stops22h 00m

$688

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sun 11/2

5:17 pm-9:20 am

2 stops33h 03m

Lisbon Humberto Delgado

Thu 11/13

10:55 am-6:54 pm

2 stops38h 59m

$698

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Tue 11/4

8:17 am-9:20 am

3 stops18h 03m

Lisbon Humberto Delgado

Tue 11/18

11:20 am-11:39 am

3 stops31h 19m

$1,064

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 17 resultsSorted by cheapest first
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See travel insights to Portugal from

How to get the cheapest flight ticket from Boise to Portugal

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Portugal?

The cheapest month to fly to Portugal from Boise is in November. Flight prices, which tend to average around $670, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of November, then book flights to Portugal from Boise during February instead. Flights to Portugal in February, while not as cheap as those in November, still average around $704.

What is the cheapest day to depart on your flight to Portugal?

According to our data, Wednesday is the cheapest day to fly to Portugal from Boise. The lowest ticket price found for a Wednesday departure recently was $1,041. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. The most expensive day to fly to Portugal is Saturday, with ticket prices averaging around $1,444.

What is the cheapest time of day to depart on your flight to Portugal?

Our most recent data shows that the best time of day to fly to Portugal is in the afternoon. Flights from Boise to Portugal during this time can be as low as $1,071. In the evening is when there is more demand to fly to Portugal, so prices are often more expensive at around $1,393 per ticket.

Cheap Boise to Portugal flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Boise to Portugal

Direct flights

None
There are no direct flights from Boise to Portugal. There are no popular flight routes from Boise to Portugal.
Search flight deals

  • When did momondo last update prices for flights from Boise Air Term. Gowen Fld Airport to Portugal?

    Prices for flights from Boise Air Term. Gowen Fld Airport to Portugal are updated daily.

  • How many operators does momondo search for flights from Boise Air Term. Gowen Fld Airport to Portugal?

  • How old do you have to be to fly from Boise Air Term. Gowen Fld Airport to Portugal?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Boise Air Term. Gowen Fld Airport to Portugal.

  • What documentation or ID do you need to fly to Portugal?

    The required travel and health documents for your Portugal trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Portugal. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

Best airlines flying from Boise to Portugal

Compare and see reviews for airlines that fly from Boise to Portugal with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $601Free CancellationRating
7.4
8,977 reviews
Search United Airlines flights
Air CanadaPriceFrom $602Free CancellationRating
7.1
10,298 reviews
Search Air Canada flights
American AirlinesPriceFrom $621Free CancellationRating
7.2
11,044 reviews
Search American Airlines flights
DeltaPriceFrom $654Free CancellationRating
7.9
7,977 reviews
Search Delta flights

Why use momondo?

Why should I use momondo to find a flight deal from Boise to Portugal?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Boise to Portugal. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Boise to Portugal with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Portugal from Boise with this policy.

How can momondo help me find flights from Boise to Portugal?

momondo helps you find the best flight between Boise and Portugal by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Boise to Portugal right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Portugal, momondo offers a useful price alert feature which will track prices for flights to Portugal from Boise and alert you when they change.

An easier way to manage your Portugal trip

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