AirHint found the following cheapest return flights from Chicago (ORD) to Keflavik (KEF)
in May 2025 (see full year ).
Return flights
06 May
- 13 May
Spirit Airlines
$ 468
01 May
- 05 May
Frontier Airlines
$ 487
06 May
- 10 May
Spirit Airlines
$ 493
01 May
- 06 May
Frontier Airlines
$ 514
09 May
- 19 May
jetBlue
$ 516
04 May
- 09 May
Spirit Airlines
$ 516
08 May
- 16 May
Spirit Airlines
$ 521
08 May
- 18 May
Spirit Airlines
$ 529
13 May
- 19 May
Spirit Airlines
$ 530
01 May
- 03 May
Frontier Airlines
$ 531
28 May
- 06 Jun
jetBlue
$ 552
29 May
- 08 Jun
jetBlue
$ 630
31 May
- 11 Jun
Air Canada
$ 645
29 May
- 07 Jun
jetBlue
$ 655
31 May
- 06 Jun
jetBlue
$ 701
24 May
- 10 Jun
Finnair
$ 752
30 May
- 04 Jun
KLM
$ 774
24 May
- 10 Jun
Icelandair
$ 782
direct
24 May
- 09 Jun
Icelandair
$ 782
direct
31 May
- 11 Jun
Icelandair
$ 785
direct
Also check the deals for one-way flights from Chicago to Keflavik in May .
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.
