Cheap Flights from Boise to Mainz

View €394 flight on Mon, 25 Aug 2025Opens in a new window

Popular airlines from Boise to Mainz

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Cheap flights from Boise to Mainz (BOI-FRA)

Prices were available within the past 7 days and start at €394 for one-way flights and €545 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Alaska Airlines
Mon, 25 Aug - Wed, 10 Sep
BOI
Boise
FRA
Frankfurt
€545 Return, found 5 days ago
€545
Return
found 5 days ago
Select Alaska Airlines flight, departing Mon, 25 Aug from Boise to Frankfurt, returning Wed, 10 Sep, priced at €545 found 5 days ago
United
Mon, 25 Aug - Wed, 10 Sep
BOI
Boise
FRA
Frankfurt
€662 Return, found 5 days ago
€662
Return
found 5 days ago
Select United flight, departing Mon, 25 Aug from Boise to Frankfurt, returning Wed, 10 Sep, priced at €662 found 5 days ago
Iberia
Mon, 25 Aug - Wed, 10 Sep
BOI
Boise
FRA
Frankfurt
€662 Return, found 5 days ago
€662
Return
found 5 days ago
Select Iberia flight, departing Mon, 25 Aug from Boise to Frankfurt, returning Wed, 10 Sep, priced at €662 found 5 days ago
American Airlines
Mon, 25 Aug - Wed, 10 Sep
BOI
Boise
FRA
Frankfurt
€662 Return, found 5 days ago
€662
Return
found 5 days ago
Select American Airlines flight, departing Mon, 25 Aug from Boise to Frankfurt, returning Wed, 10 Sep, priced at €662 found 5 days ago
Finnair
Mon, 25 Aug - Wed, 10 Sep
BOI
Boise
FRA
Frankfurt
€832 Return, found 5 days ago
€832
Return
found 5 days ago
Select Finnair flight, departing Mon, 25 Aug from Boise to Frankfurt, returning Wed, 10 Sep, priced at €832 found 5 days ago
Icelandair
Mon, 25 Aug - Wed, 10 Sep
BOI
Boise
FRA
Frankfurt
€879 Return, found 5 days ago
€879
Return
found 5 days ago
Select Icelandair flight, departing Mon, 25 Aug from Boise to Frankfurt, returning Wed, 10 Sep, priced at €879 found 5 days ago

Find the cheapest month to fly from Boise (BOI) to Frankfurt (FRA)

October is typically the cheapest month to fly

From €425 - €1,000 per traveller.

Graph displaying average flight prices per month

*Available to Expedia members.