Frontier Airlines Flight 45 Deals & Information (2026/2027)

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Frontier Airlines Flight 45 Route Deals From $200

The cheapest prices found with in the last 7 days for return flights were $349 and $200 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Tue, Aug 11 - Fri, Sep 11
CUN
Cancun Intl.
ORD
O'Hare Intl.
$349 Roundtrip, found 6 hours ago
$349
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Tue, Aug 11 from Cancun Intl. to O'Hare Intl., returning Fri, Sep 11, priced at $349 found 6 hours ago
Wed, Aug 5 - Tue, Aug 11
CUN
Cancun Intl.
ORD
O'Hare Intl.
$360 Roundtrip, found 20 hours ago
$360
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Wed, Aug 5 from Cancun Intl. to O'Hare Intl., returning Tue, Aug 11, priced at $360 found 20 hours ago
Wed, Aug 5 - Tue, Aug 11
CUN
Cancun Intl.
ORD
O'Hare Intl.
$366 Roundtrip, found 20 hours ago
$366
Roundtrip
found 20 hours ago
Select Frontier Airlines flight, departing Wed, Aug 5 from Cancun Intl. to O'Hare Intl., returning Tue, Aug 11, priced at $366 found 20 hours ago
Mon, Aug 3 - Wed, Aug 12
CUN
Cancun Intl.
ORD
O'Hare Intl.
$386 Roundtrip, found 5 days ago
$386
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Mon, Aug 3 from Cancun Intl. to O'Hare Intl., returning Wed, Aug 12, priced at $386 found 5 days ago
Fri, Sep 4 - Fri, Sep 11
CUN
Cancun Intl.
ORD
O'Hare Intl.
$391 Roundtrip, found 2 days ago
$391
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Sep 4 from Cancun Intl. to O'Hare Intl., returning Fri, Sep 11, priced at $391 found 2 days ago
Wed, Aug 12 - Mon, Aug 17
CUN
Cancun Intl.
ORD
O'Hare Intl.
$391 Roundtrip, found 1 day ago
$391
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Aug 12 from Cancun Intl. to O'Hare Intl., returning Mon, Aug 17, priced at $391 found 1 day ago
Tue, Aug 11 - Fri, Sep 11
CUN
Cancun Intl.
ORD
O'Hare Intl.
$395 Roundtrip, found 6 hours ago
$395
Roundtrip
found 6 hours ago
Select Frontier Airlines flight, departing Tue, Aug 11 from Cancun Intl. to O'Hare Intl., returning Fri, Sep 11, priced at $395 found 6 hours ago
Fri, Sep 4 - Fri, Sep 11
CUN
Cancun Intl.
ORD
O'Hare Intl.
$400 Roundtrip, found 2 days ago
$400
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, Sep 4 from Cancun Intl. to O'Hare Intl., returning Fri, Sep 11, priced at $400 found 2 days ago
Wed, Aug 12 - Mon, Aug 17
CUN
Cancun Intl.
ORD
O'Hare Intl.
$403 Roundtrip, found 1 day ago
$403
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Aug 12 from Cancun Intl. to O'Hare Intl., returning Mon, Aug 17, priced at $403 found 1 day ago
Wed, Aug 19 - Mon, Aug 24
CUN
Cancun Intl.
ORD
O'Hare Intl.
$406 Roundtrip, found 1 day ago
$406
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Wed, Aug 19 from Cancun Intl. to O'Hare Intl., returning Mon, Aug 24, priced at $406 found 1 day ago
Mon, Aug 3 - Wed, Aug 12
CUN
Cancun Intl.
ORD
O'Hare Intl.
$407 Roundtrip, found 5 days ago
$407
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Mon, Aug 3 from Cancun Intl. to O'Hare Intl., returning Wed, Aug 12, priced at $407 found 5 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.