Cheapest return flights from St. Louis to Keflavik in July from $807

AirHint found the following cheapest return flights from St. Louis (STL) to Keflavik (KEF) in July 2026 (see full year).

Return flights

20 Jul - 30 Aug United
28 Jul - 07 Aug Delta
28 Jul - 06 Aug Delta
20 Jul - 30 Jul Air Canada
19 Jul - 29 Jul Air Canada
21 Jul - 30 Jul United
19 Jul - 28 Jul Air Canada
21 Jul - 31 Jul Air Canada
22 Jul - 31 Jul Air Canada
21 Jul - 02 Aug United
21 Jul - 01 Aug United
22 Jul - 01 Aug United
20 Jul - 01 Aug United
19 Jul - 01 Aug Air Canada
25 Jul - 01 Aug United
01 Jul - 13 Jul United

Also check the deals for one-way flights from St. Louis to Keflavik in July.

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