Cheapest one-way flights from St. Louis to Keflavik in June from $525
AirHint found the following cheapest one-way flights from St. Louis (STL) to Keflavik (KEF) in June 2025 (see full year).
One-Way flights
| 01 Jun | Southern Airways Express |
Also check the deals for return flights from St. Louis to Keflavik in June.
The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.
