Home Fares From A City Phoenix, AZ Phoenix, AZ (PHX) To St. Louis, MO (STL)
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    Wed & Sat
    Wed, December 07, 2016
    Wed, March 01, 2017
Peter T.
Staff Airfare Analyst
Peter's Notes:
No min. stay. Fare can be bought one-way for half the lowest roundtrip price. No peak holiday travel at this price. Winter travel.
New nonstop service on Frontier Airlines begins Dec. 7, 2016. Blackout dates apply: Dec. 16, 2016 - Jan. 2, 2017; Jan. 16; Feb. 18 & 20-21, 2017.

Fare found on FlyFrontier.com. Lower fares may be available for Frontier Discount Den members.

Frontier charges a $30-$35 fee each way for carry-on bags larger than 18x14x8 inches and a $25-$30 fee each way for first checked bag no larger than 62 linear inches (length + width + depth) and no heavier than 50 pounds. These bag fees apply to online purchases before check-in. Higher fees apply at the airport.

During booking on FlyFrontier.com, you can purchase "The Works", which includes one checked bag, one carry-on bag, stretch seating, no change fees, and refundability, for much less than purchasing these items separately.
To the best of our knowledge, there is a reasonable amount of seat availability at the stated price. Flexible travel dates may be required to find this rate; seats may not be available on all flights or all dates of travel. Holiday periods may be excluded. We monitor the availability of the fare and take efforts to remove and/or modify fares when no longer available.
All mandatory taxes/fees are included in the price. Tax-inclusive fare may be a few dollars higher or lower depending on the airport you connect through, if any. Baggage fees, if applicable, and other optional fees are not included. Our Dealhounds found this airfare using flexible date search. This means we searched a range of dates to find you the best price.
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Reviews for Phoenix to St. Louis
1 Traveler Reviews
"Southwest good as always"
Flight from Phoenix to St. Louis
Airline: Southwest
RT/OW: roundtrip
Number of Stops: 1 stop in MCI
Date of Flight: April 2011
Seat Class: economy
Check-in Experience
In-flight Service
Seat Comfort
I appreciate the SWA ways....free bags...free non-alcoholic drinks and snack. Choose my seat...friendly service...keeping the passangers informed of times and other important info, such as a storm delay before departing from STL to PHX on 4/19/11
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There are approximately 367 flights covering the route from Sky Harbor International Airport in Phoenix to Lambert-St. Louis International Airport in , provided by as many as 9 airlines.
The following airlines often offer cheap flights from Phoenix to
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