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Cheap flights from Great Falls to Costa Rica from $430

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Great Falls to Costa Rica departing on 12/8. 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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Cheap round-trip flights

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Alaska Airlines Logo
7:35 pm - 6:20 amGTF-LIR
57h 45m2 stops
Alaska Airlines Logo
7:17 pm - 6:55 pmLIR-GTF
24h 38m2 stops
$430Alaska Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
Alaska Airlines Logo
7:35 pm - 6:07 pmGTF-LIR
21h 32m2 stops
Alaska Airlines Logo
7:17 pm - 6:55 pmLIR-GTF
24h 38m2 stops
$493Alaska Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
United Airlines Logo
2:35 pm - 4:08 pmGTF-LIR
24h 33m1 stop
United Airlines Logo
8:35 am - 9:32 pmLIR-GTF
13h 57m2 stops
$809United Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
United Airlines Logo
2:35 pm - 4:08 pmGTF-LIR
24h 33m1 stop
United Airlines Logo
2:20 pm - 1:39 pmLIR-GTF
48h 19m2 stops
$883United Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
United Airlines Logo
6:15 am - 4:08 pmGTF-LIR
8h 53m1 stop
United Airlines Logo
12:50 pm - 9:32 pmLIR-GTF
9h 42m1 stop
$1,080United Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
United Airlines Logo
6:15 am - 4:08 pmGTF-LIR
8h 53m1 stop
United Airlines Logo
12:50 pm - 9:32 pmLIR-GTF
9h 42m1 stop
$1,200United Airlines
Find Deal
Mon, Dec 8 - Fri, Dec 12
Alaska Airlines Logo
7:21 pm - 5:57 pmGTF-LIR
21h 36m2 stops
Alaska Airlines Logo
6:23 pm - 6:41 pmLIR-GTF
25h 18m2 stops
$2,869Alaska Airlines
Find Deal
Wed, Dec 24 - Sat, Jan 3
United Airlines Logo
2:35 pm - 4:08 pmGTF-LIR
24h 33m1 stop
United Airlines Logo
12:50 pm - 10:46 pmLIR-GTF
10h 56m1 stop
$3,376United Airlines
Find Deal
Wed, Dec 24 - Sat, Jan 3
United Airlines Logo
2:35 pm - 4:08 pmGTF-LIR
24h 33m1 stop
United Airlines Logo
3:50 pm - 1:39 pmLIR-GTF
22h 49m2 stops
$4,964United Airlines
Find Deal
Wed, Dec 24 - Sat, Jan 3

Alaska Airlines flights from Great Falls to Costa Rica

Our best Alaska Airlines deals on Great Falls to Costa Rica flight tickets
Alaska Airlines
Dec 8
GTF7:35 pmGreat Falls
57h 45m
2 stops
LIR6:20 amLiberia
Dec 12
LIR7:17 pmLiberia
24h 38m
2 stops
GTF6:55 pmGreat Falls
$430
Find similar
Alaska Airlines
Dec 8
GTF7:35 pmGreat Falls
21h 32m
2 stops
LIR6:07 pmLiberia
Dec 12
LIR7:17 pmLiberia
24h 38m
2 stops
GTF6:55 pmGreat Falls
$493
Find similar
Alaska Airlines
Dec 24
GTF7:21 pmGreat Falls
21h 36m
2 stops
LIR5:57 pmLiberia
Jan 3
LIR6:23 pmLiberia
25h 18m
2 stops
GTF6:41 pmGreat Falls
$2,869
Find similar

United Airlines flights from Great Falls to Costa Rica

Our best United Airlines deals on Great Falls to Costa Rica flight tickets
United Airlines
Dec 8
GTF2:35 pmGreat Falls
24h 33m
1 stop
LIR4:08 pmLiberia
Dec 12
LIR8:35 amLiberia
13h 57m
2 stops
GTF9:32 pmGreat Falls
$809
Find similar
United Airlines
Dec 8
GTF2:35 pmGreat Falls
24h 33m
1 stop
LIR4:08 pmLiberia
Dec 12
LIR2:20 pmLiberia
48h 19m
2 stops
GTF1:39 pmGreat Falls
$883
Find similar
United Airlines
Dec 8
GTF6:15 amGreat Falls
8h 53m
1 stop
LIR4:08 pmLiberia
Dec 12
LIR12:50 pmLiberia
9h 42m
1 stop
GTF9:32 pmGreat Falls
$1,080
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Great Falls to Costa Rica 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 16, 2025.
Use the filters below to find and compare flights from Great Falls to Costa Rica that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Mon 12/8

7:35 pm-6:20 am

2 stops57h 45m

Liberia

Fri 12/12

7:17 pm-6:55 pm

2 stops24h 38m

$430

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Mon 12/8

7:35 pm-6:07 pm

2 stops21h 32m

Liberia

Fri 12/12

7:17 pm-6:55 pm

2 stops24h 38m

$493

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Mon 12/8

2:35 pm-4:08 pm

1 stop24h 33m

Liberia

Fri 12/12

8:35 am-9:32 pm

2 stops13h 57m

$809

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Mon 12/8

2:35 pm-4:08 pm

1 stop24h 33m

Liberia

Fri 12/12

2:20 pm-1:39 pm

2 stops48h 19m

$883

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Mon 12/8

6:15 am-4:08 pm

1 stop8h 53m

Liberia

Fri 12/12

12:50 pm-9:32 pm

1 stop9h 42m

$1,080

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Mon 12/8

6:15 am-4:08 pm

1 stop8h 53m

Liberia

Fri 12/12

12:50 pm-9:32 pm

1 stop9h 42m

$1,200

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Wed 12/24

7:21 pm-5:57 pm

2 stops21h 36m

Liberia

Sat 1/3

6:23 pm-6:41 pm

2 stops25h 18m

$2,869

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Wed 12/24

2:35 pm-4:08 pm

1 stop24h 33m

Liberia

Sat 1/3

12:50 pm-10:46 pm

1 stop10h 56m

$3,376

Great FallsLiberia

GTF - LIR

GTFLIR

Great Falls

Wed 12/24

2:35 pm-4:08 pm

1 stop24h 33m

Liberia

Sat 1/3

3:50 pm-1:39 pm

2 stops22h 49m

$4,964

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

See travel insights to Costa Rica from

How to get the cheapest flight ticket from Great Falls to Costa Rica

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 day to depart on your flight to Costa Rica?

According to our data, Saturday is the cheapest day to fly to Costa Rica from Great Falls. The lowest ticket price found for a Saturday departure recently was $866. Keep in mind that prices can always vary depending on your route and whether or not you are flying domestic or international. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around $996. These prices are subject to change though, so be sure to set up a Price Alert for flights to Costa Rica.

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

In the afternoon is the cheapest time of day to fly from Great Falls to Costa Rica when you can find flight prices for as low as $996. Flying to Costa Rica in the afternoon is an ideal time because this is during off-peak travel hours. Flights to Costa Rica are more costly in the morning, with an average ticket price of $1,031. Departure times in the morning fall within the peak daily travel times, which is why tickets can be more expensive.

Cheap Great Falls to Costa Rica flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Great Falls to Costa Rica

Direct flights

None
There are no direct flights from Great Falls to Costa Rica. There are no popular flight routes from Great Falls to Costa Rica.
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  • When did momondo last update prices for flights from Great Falls Airport to Costa Rica?

    Prices for flights from Great Falls Airport to Costa Rica are refreshed on a daily basis.

  • How many operators does momondo search for flights from Great Falls Airport to Costa Rica?

  • How old do you have to be to fly from Great Falls Airport to Costa Rica?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Great Falls Airport to Costa Rica.

  • What documentation or ID do you need to fly to Costa Rica?

    The travel and health documents you'll need for your trip to Costa Rica may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Costa Rica. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Great Falls to Costa Rica

Compare and see reviews for airlines that fly from Great Falls to Costa Rica with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom $350Free CancellationRating
7.4
8,982 reviews
Search United Airlines flights

Why use momondo?

Why should I use momondo to find a flight deal from Great Falls to Costa Rica?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Costa Rica from Great Falls.

Can I find flights from Great Falls to Costa Rica with flexible booking policies on momondo?

Flights from Great Falls to Costa Rica with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.

How can momondo help me find flights from Great Falls to Costa Rica?

Once all potential Great Falls to Costa Rica flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Great Falls to Costa Rica right now. Can momondo alert me if prices change?

Price alerts on flights to Costa Rica from Great Falls are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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