Frontier Airlines Flight UA45 Deals & Information (2025/2026)

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Frontier Airlines Flight 45 Route Deals From $122

The cheapest prices found with in the last 7 days for return flights were $223 and $122 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sat, Oct 4 - Mon, Oct 6
CUN
Cancun Intl.
ORD
O'Hare Intl.
$223 Roundtrip, found 1 day ago
$223
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Oct 4 from Cancun Intl. to O'Hare Intl., returning Mon, Oct 6, priced at $223 found 1 day ago
Sat, Oct 4 - Tue, Oct 7
CUN
Cancun Intl.
ORD
O'Hare Intl.
$231 Roundtrip, found 1 day ago
$231
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Sat, Oct 4 from Cancun Intl. to O'Hare Intl., returning Tue, Oct 7, priced at $231 found 1 day ago
Fri, Dec 5 - Mon, Dec 8
CUN
Cancun Intl.
ORD
O'Hare Intl.
$232 Roundtrip, found 1 day ago
$232
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Dec 5 from Cancun Intl. to O'Hare Intl., returning Mon, Dec 8, priced at $232 found 1 day ago
Wed, Nov 19 - Mon, Dec 8
CUN
Cancun Intl.
ORD
O'Hare Intl.
$241 Roundtrip, found 5 days ago
$241
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Nov 19 from Cancun Intl. to O'Hare Intl., returning Mon, Dec 8, priced at $241 found 5 days ago
Thu, Nov 6 - Sat, Nov 15
CUN
Cancun Intl.
ORD
O'Hare Intl.
$253 Roundtrip, just found
$253
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Nov 6 from Cancun Intl. to O'Hare Intl., returning Sat, Nov 15, priced at $253 just found

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.