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

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Frontier Airlines Flight 45 Route Deals From $107

The cheapest prices found with in the last 7 days for return flights were $144 and $107 for one-way flights to O'Hare Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Thu, Jan 22 - Mon, Jan 26
CUN
Cancun Intl.
ORD
O'Hare Intl.
$144 Roundtrip, found 4 days ago
$144
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Thu, Jan 22 from Cancun Intl. to O'Hare Intl., returning Mon, Jan 26, priced at $144 found 4 days ago
Wed, Feb 25 - Mon, Mar 2
CUN
Cancun Intl.
ORD
O'Hare Intl.
$154 Roundtrip, found 5 days ago
$154
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Feb 25 from Cancun Intl. to O'Hare Intl., returning Mon, Mar 2, priced at $154 found 5 days ago
Fri, Jan 23 - Sun, Feb 1
CUN
Cancun Intl.
ORD
O'Hare Intl.
$155 Roundtrip, found 7 hours ago
$155
Roundtrip
found 7 hours ago
Select Frontier Airlines flight, departing Fri, Jan 23 from Cancun Intl. to O'Hare Intl., returning Sun, Feb 1, priced at $155 found 7 hours ago
Thu, Jan 29 - Mon, Feb 2
CUN
Cancun Intl.
ORD
O'Hare Intl.
$157 Roundtrip, just found
$157
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Jan 29 from Cancun Intl. to O'Hare Intl., returning Mon, Feb 2, priced at $157 just found
Fri, Jan 23 - Thu, Jan 29
CUN
Cancun Intl.
ORD
O'Hare Intl.
$159 Roundtrip, found 5 hours ago
$159
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Fri, Jan 23 from Cancun Intl. to O'Hare Intl., returning Thu, Jan 29, priced at $159 found 5 hours ago
Thu, Feb 19 - Mon, Feb 23
CUN
Cancun Intl.
ORD
O'Hare Intl.
$161 Roundtrip, just found
$161
Roundtrip
just found
Select Frontier Airlines flight, departing Thu, Feb 19 from Cancun Intl. to O'Hare Intl., returning Mon, Feb 23, priced at $161 just found
Wed, Mar 4 - Sun, Mar 8
CUN
Cancun Intl.
ORD
O'Hare Intl.
$163 Roundtrip, found 5 days ago
$163
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Wed, Mar 4 from Cancun Intl. to O'Hare Intl., returning Sun, Mar 8, priced at $163 found 5 days ago
Fri, Jan 23 - Fri, Jan 30
CUN
Cancun Intl.
ORD
O'Hare Intl.
$166 Roundtrip, found 10 hours ago
$166
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Fri, Jan 23 from Cancun Intl. to O'Hare Intl., returning Fri, Jan 30, priced at $166 found 10 hours ago
Thu, Mar 5 - Mon, Mar 9
CUN
Cancun Intl.
ORD
O'Hare Intl.
$168 Roundtrip, found 1 hour ago
$168
Roundtrip
found 1 hour ago
Select Frontier Airlines flight, departing Thu, Mar 5 from Cancun Intl. to O'Hare Intl., returning Mon, Mar 9, priced at $168 found 1 hour ago
Fri, Jan 16 - Sun, Jan 18
CUN
Cancun Intl.
ORD
O'Hare Intl.
$170 Roundtrip, found 6 days ago
$170
Roundtrip
found 6 days ago
Select Frontier Airlines flight, departing Fri, Jan 16 from Cancun Intl. to O'Hare Intl., returning Sun, Jan 18, priced at $170 found 6 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.