Frontier Airlines Flight NK45 Deals & Information (2025/2026)

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Frontier Airlines Flight 45 Route Deals From $128

The cheapest prices found with in the last 7 days for return flights were $211 and $128 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 26 - Tue, Oct 21
CUN
Cancun Intl.
ORD
O'Hare Intl.
$211 Roundtrip, found 4 days ago
$211
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Tue, Aug 26 from Cancun Intl. to O'Hare Intl., returning Tue, Oct 21, priced at $211 found 4 days ago
Thu, Oct 16 - Tue, Oct 21
CUN
Cancun Intl.
ORD
O'Hare Intl.
$216 Roundtrip, found 3 days ago
$216
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Oct 16 from Cancun Intl. to O'Hare Intl., returning Tue, Oct 21, priced at $216 found 3 days ago
Tue, Aug 26 - Tue, Oct 21
CUN
Cancun Intl.
ORD
O'Hare Intl.
$238 Roundtrip, found 4 days ago
$238
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Tue, Aug 26 from Cancun Intl. to O'Hare Intl., returning Tue, Oct 21, priced at $238 found 4 days ago
Sun, Nov 2 - Sun, Nov 9
CUN
Cancun Intl.
ORD
O'Hare Intl.
$238 Roundtrip, found 1 day ago
$238
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Nov 2 from Cancun Intl. to O'Hare Intl., returning Sun, Nov 9, priced at $238 found 1 day ago
Thu, Aug 28 - Sat, Sep 6
CUN
Cancun Intl.
ORD
O'Hare Intl.
$239 Roundtrip, found 3 days ago
$239
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Aug 28 from Cancun Intl. to O'Hare Intl., returning Sat, Sep 6, priced at $239 found 3 days ago
Sun, Sep 14 - Sun, Sep 21
CUN
Cancun Intl.
ORD
O'Hare Intl.
$242 Roundtrip, found 1 day ago
$242
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sun, Sep 14 from Cancun Intl. to O'Hare Intl., returning Sun, Sep 21, priced at $242 found 1 day ago
Thu, Oct 16 - Tue, Oct 21
CUN
Cancun Intl.
ORD
O'Hare Intl.
$253 Roundtrip, found 3 days ago
$253
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Oct 16 from Cancun Intl. to O'Hare Intl., returning Tue, Oct 21, priced at $253 found 3 days ago

Frequently asked questions

What route does flight number F945 take?
You'll be landing at Chicago, IL Airport (ORD-O'Hare Intl.) from Cancun Airport if you've booked a ticket on flight number F945. You'll be in the air for 4 hours during this trip. What's more, the flight conveniently travels non-stop.
How often is F945 on time?
Approximately 83% of F945 flights arrive on time — so if you'll be up in the air between Cancun, Quintana Roo Airport (CUN-Cancun Intl.) and O'Hare Intl. Airport (ORD), you can relax in confidence knowing that you will reach your destination ASAP. On the rare occasion that this Frontier Airlines flight encounters a delay, you can expect a wait time of roughly 29 minutes. Thanks to the airline's top-notch service, this route has a star rating of 2.2.
What terminal does F945 fly out of?
You'll likely be taking off from Terminal 4 if you're traveling on flight number F945 direct from CUN to Chicago, IL Airport (ORD-O'Hare Intl.).
What kind of plane is on flight number F945?
The route for flight number F945 is almost always Cancun Airport to O'Hare Intl. Airport (ORD), and the Airbus A320 is the type of plane you'll probably be taking off on.
If I am not able to travel due to COVID-19, can I change my flight to a later date?
For more info about changing your F945 flight with Travelocity, please visit our Customer Service Portal.