Frontier Airlines Flight 91 Deals & Information (2026/2027)

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Frontier Airlines Flight 91 Route Deals From $171

The cheapest prices found with in the last 7 days for return flights were $372 and $171 for one-way flights to Cancun Intl. for the period specified. Prices and availability are subject to change. Additional terms apply.

Sun, Aug 30 - Fri, Sep 4
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$372 Roundtrip, just found
$372
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Aug 30 from Philadelphia Intl. to Cancun Intl., returning Fri, Sep 4, priced at $372 just found
Sun, Aug 30 - Thu, Sep 3
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$377 Roundtrip, found 21 hours ago
$377
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Sun, Aug 30 from Philadelphia Intl. to Cancun Intl., returning Thu, Sep 3, priced at $377 found 21 hours ago
Sun, Aug 30 - Fri, Sep 4
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$382 Roundtrip, just found
$382
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Aug 30 from Philadelphia Intl. to Cancun Intl., returning Fri, Sep 4, priced at $382 just found
Sun, Aug 30 - Thu, Sep 3
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$388 Roundtrip, found 21 hours ago
$388
Roundtrip
found 21 hours ago
Select Frontier Airlines flight, departing Sun, Aug 30 from Philadelphia Intl. to Cancun Intl., returning Thu, Sep 3, priced at $388 found 21 hours ago
Sun, Aug 23 - Thu, Aug 27
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$388 Roundtrip, just found
$388
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Aug 23 from Philadelphia Intl. to Cancun Intl., returning Thu, Aug 27, priced at $388 just found
Tue, Aug 11 - Thu, Aug 20
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$398 Roundtrip, found 5 days ago
$398
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Tue, Aug 11 from Philadelphia Intl. to Cancun Intl., returning Thu, Aug 20, priced at $398 found 5 days ago
Tue, Aug 11 - Thu, Aug 20
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$407 Roundtrip, found 5 days ago
$407
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Tue, Aug 11 from Philadelphia Intl. to Cancun Intl., returning Thu, Aug 20, priced at $407 found 5 days ago
Sun, Aug 23 - Sat, Aug 29
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$409 Roundtrip, just found
$409
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Aug 23 from Philadelphia Intl. to Cancun Intl., returning Sat, Aug 29, priced at $409 just found
Sun, Aug 23 - Thu, Aug 27
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$420 Roundtrip, just found
$420
Roundtrip
just found
Select Frontier Airlines flight, departing Sun, Aug 23 from Philadelphia Intl. to Cancun Intl., returning Thu, Aug 27, priced at $420 just found
Wed, Jul 29 - Wed, Aug 12
PHL
Philadelphia Intl.
CUN
Cancun Intl.
$423 Roundtrip, found 3 days ago
$423
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Wed, Jul 29 from Philadelphia Intl. to Cancun Intl., returning Wed, Aug 12, priced at $423 found 3 days ago

Frequently asked questions

What route does flight number F991 take?
Flight number F991 operates directly from Philadelphia Airport to Cancun Intl. Airport (CUN). During this trip, expect to be in the air for about 4 hours. It's wise to book ahead to secure your preferred seat.
What terminal does F991 fly out of?
You'll likely be jetting out of Terminal E if you're flying on F991 direct from Philadelphia Intl. Airport (PHL) to Cancun Airport.
What kind of plane is on flight number F991?
There's every chance you'll find yourself jumping on board an Airbus A320 if you're traveling on flight number F991. Generally, this flight departs from Philadelphia Airport and comes in to land at Cancun Airport.
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 F991 flight with Travelocity, please visit our Customer Service Portal.