Earn point on your loyalty program!arrow arc left

Cheap flights from Great Falls (GTF) to Lisbon (LIS)

Know your dates, get live prices in seconds
airplane logo

pin logo

calendar
Departure
calendar backward
Return
airplane logo
1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
Save up to 31%
Book Flight + Hotel at the same time

How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)

How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.

Cheap flights from Great Falls to Lisbon in August , September 2026

25 Aug - 18 Sep $ 1,524.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
Pick dates
23 Aug - 18 Sep $ 1,524.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
Pick dates
24 Aug - 18 Sep $ 1,527.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
Pick dates

Last minute flights from Great Falls to Lisbon

25 Aug - 02 Sep $ 1,880.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
Pick dates
23 Aug - 02 Sep $ 1,880.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
Pick dates
24 Aug - 02 Sep $ 1,883.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
Pick dates

One-way flights to Lisbon from Great Falls

5:18 PM - 6:45 PM
TAP Portugal
2 Stops
21h 17m
GTF - LIS
$ 821
Kiwi
Pick dates
5:18 PM - 7:50 PM
TAP Portugal
2 Stops
22h 22m
GTF - LIS
$ 821
Kiwi
Pick dates
5:18 PM - 6:45 PM
TAP Portugal
2 Stops
21h 17m
GTF - LIS
$ 824
Kiwi
Pick dates

How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)

Related info for your journey
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.
How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)
Some placeholder content for the first accordion panel. This panel is shown by default, thanks to the .show class.