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

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1 Adults (11+)
0 Children (2~11)
0 Infants (0~2)
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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)
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How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)
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How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)
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Cheap flights from Great Falls to Lisbon in September , October 2026

28 Sep - 30 Oct $ 1,660.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
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28 Sep - 29 Oct $ 1,663.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
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29 Sep - 30 Oct $ 1,664.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
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Last minute flights from Great Falls to Lisbon

28 Sep - 01 Oct $ 1,799.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
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28 Sep - 01 Oct $ 1,816.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
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28 Sep - 01 Oct $ 1,832.00
GTF
Great Falls
Alaska Airlines
2 STOPS
LIS
Lisbon
LIS
Lisbon
Alaska Airlines
3 STOPS
GTF
Great Falls
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One-way flights to Lisbon from Great Falls

5:19 PM - 7:50 PM
TAP Portugal
2 Stops
22h 21m
GTF - LIS
$ 850
Kiwi
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5:19 PM - 7:50 PM
TAP Portugal
2 Stops
22h 21m
GTF - LIS
$ 854
Kiwi
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5:19 PM - 6:45 PM
TAP Portugal
2 Stops
21h 16m
GTF - LIS
$ 867
Kiwi
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How to find the cheapest flight from Great Falls (GTF) to Lisbon (LIS)

Related info for your journey
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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.