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Cheap flights from Boise to Portugal from $294

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 2/23. 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.
Multiple Airlines Logo
7:20 am - 12:05 pm
BOI
-
LIS
21h 45m2 stops
Multiple Airlines Logo
8:45 pm - 1:08 pm
LIS
-
BOI
23h 23m2 stops
$452Multiple Airlines
Sun, Jan 11 - Mon, Jan 26
United Airlines Logo
6:10 am - 9:20 am
BOI
-
LIS
20h 10m2 stops
United Airlines Logo
11:20 am - 4:10 pm
LIS
-
BOI
35h 50m2 stops
$471United Airlines
Fri, Jan 16 - Fri, Jan 23
United Airlines Logo
6:10 am - 8:10 am
BOI
-
LIS
19h 00m2 stops
United Airlines Logo
10:15 am - 11:48 pm
LIS
-
BOI
20h 33m2 stops
$485United Airlines
Fri, Jan 30 - Tue, Feb 3
Iberia Logo
7:00 am - 7:40 am
BOI
-
LIS
17h 40m2 stops
Iberia Logo
8:45 pm - 12:46 pm
LIS
-
BOI
23h 01m2 stops
$492Iberia
Thu, Feb 12 - Mon, Feb 23
Multiple Airlines Logo
7:00 am - 9:05 am
BOI
-
LIS
20h 05m2 stops
Multiple Airlines Logo
4:10 pm - 10:36 pm
LIS
-
BOI
36h 26m2 stops
$499Multiple Airlines
Mon, Mar 9 - Tue, Mar 17
Multiple Airlines Logo
5:30 pm - 11:10 am
BOI
-
LIS
58h 40m2 stops
Multiple Airlines Logo
6:10 pm - 9:36 pm
LIS
-
BOI
34h 26m2 stops
$654Multiple Airlines
Sat, Apr 11 - Mon, Apr 20
Air Canada Logo
2:43 pm - 9:20 am
BOI
-
LIS
35h 37m2 stops
Air Canada Logo
11:25 am - 11:05 pm
LIS
-
BOI
42h 40m2 stops
$678Air Canada
Sat, May 2 - Mon, May 11
United Airlines Logo
2:40 pm - 9:20 am
BOI
-
LIS
35h 40m2 stops
United Airlines Logo
12:55 pm - 10:22 pm
LIS
-
BOI
40h 27m2 stops
$687United Airlines
Sat, Apr 18 - Sat, May 2
Air Canada Logo
2:43 pm - 9:20 am
BOI
-
LIS
35h 37m2 stops
Air Canada Logo
11:25 am - 9:16 pm
LIS
-
BOI
40h 51m2 stops
$708Air Canada
Sat, May 2 - Mon, May 11
Multiple Airlines Logo
10:39 am - 11:05 am
BOI
-
LIS
17h 26m3 stops
Multiple Airlines Logo
11:25 am - 11:59 pm
LIS
-
BOI
19h 34m2 stops
$769Multiple Airlines
Sat, May 2 - Mon, May 11

United Airlines flights from Boise to Portugal

Our best United Airlines deals on Boise to Portugal flight tickets
United Airlines
Jan 16
BOI6:10 amBoise Air Term. Gowen Fld
20h 10m
2 stops
LIS9:20 amLisbon Humberto Delgado
Jan 23
LIS11:20 amLisbon Humberto Delgado
35h 50m
2 stops
BOI4:10 pmBoise Air Term. Gowen Fld
$471
Find similar
United Airlines
Jan 30
BOI6:10 amBoise Air Term. Gowen Fld
19h 00m
2 stops
LIS8:10 amLisbon Humberto Delgado
Feb 3
LIS10:15 amLisbon Humberto Delgado
20h 33m
2 stops
BOI11:48 pmBoise Air Term. Gowen Fld
$485
Find similar
United Airlines
Apr 18
BOI2:40 pmBoise Air Term. Gowen Fld
35h 40m
2 stops
LIS9:20 amLisbon Humberto Delgado
May 2
LIS12:55 pmLisbon Humberto Delgado
40h 27m
2 stops
BOI10:22 pmBoise Air Term. Gowen Fld
$687
Find similar

Air Canada flights from Boise to Portugal

Our best Air Canada deals on Boise to Portugal flight tickets
Air Canada
May 2
BOI2:43 pmBoise Air Term. Gowen Fld
35h 37m
2 stops
LIS9:20 amLisbon Humberto Delgado
May 11
LIS11:25 amLisbon Humberto Delgado
42h 40m
2 stops
BOI11:05 pmBoise Air Term. Gowen Fld
$678
Find similar
Air Canada
May 2
BOI2:43 pmBoise Air Term. Gowen Fld
35h 37m
2 stops
LIS9:20 amLisbon Humberto Delgado
May 11
LIS11:25 amLisbon Humberto Delgado
40h 51m
2 stops
BOI9:16 pmBoise Air Term. Gowen Fld
$708
Find similar
Air Canada
May 14
BOI5:22 pmBoise Air Term. Gowen Fld
56h 58m
2 stops
LIS9:20 amLisbon Humberto Delgado
May 24
LIS12:55 pmLisbon Humberto Delgado
41h 10m
2 stops
BOI11:05 pmBoise Air Term. Gowen Fld
$778
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 December 4, 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

Sun 1/11

7:20 am-12:05 pm

2 stops21h 45m

Lisbon Humberto Delgado

Mon 1/26

8:45 pm-1:08 pm

2 stops23h 23m

$452

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 1/16

6:10 am-9:20 am

2 stops20h 10m

Lisbon Humberto Delgado

Fri 1/23

11:20 am-4:10 pm

2 stops35h 50m

$471

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Fri 1/30

6:10 am-8:10 am

2 stops19h 00m

Lisbon Humberto Delgado

Tue 2/3

10:15 am-11:48 pm

2 stops20h 33m

$485

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Thu 2/12

7:00 am-7:40 am

2 stops17h 40m

Lisbon Humberto Delgado

Mon 2/23

8:45 pm-12:46 pm

2 stops23h 01m

$492

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Mon 3/9

7:00 am-9:05 am

2 stops20h 05m

Lisbon Humberto Delgado

Tue 3/17

4:10 pm-10:36 pm

2 stops36h 26m

$499

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 4/11

5:30 pm-11:10 am

2 stops58h 40m

Lisbon Humberto Delgado

Mon 4/20

6:10 pm-9:36 pm

2 stops34h 26m

$654

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 5/2

2:43 pm-9:20 am

2 stops35h 37m

Lisbon Humberto Delgado

Mon 5/11

11:25 am-11:05 pm

2 stops42h 40m

$678

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 4/18

2:40 pm-9:20 am

2 stops35h 40m

Lisbon Humberto Delgado

Sat 5/2

12:55 pm-10:22 pm

2 stops40h 27m

$687

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 5/2

2:43 pm-9:20 am

2 stops35h 37m

Lisbon Humberto Delgado

Mon 5/11

11:25 am-9:16 pm

2 stops40h 51m

$708

BoiseLisbon

BOI - LIS

BOILIS

Boise Air Term. Gowen Fld

Sat 5/2

10:39 am-11:05 am

3 stops17h 26m

Lisbon Humberto Delgado

Mon 5/11

11:25 am-11:59 pm

2 stops19h 34m

$769

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 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 December. Flight prices, which tend to average around $631, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of December, then book flights to Portugal from Boise during November instead. Flights to Portugal in November, while not as cheap as those in December, still average around $649.

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

Fastest flight time

18h 38m

Direct flights

None
The fastest flight from Boise to Portugal takes 18h 38m
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
9,064 reviews
Search United Airlines flights
Air CanadaPriceFrom $602Free CancellationRating
7.1
10,500 reviews
Search Air Canada flights
American AirlinesPriceFrom $621Free CancellationRating
7.2
11,043 reviews
Search American Airlines flights
DeltaPriceFrom $654Free CancellationRating
7.9
8,011 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.

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