$82 Find Cheap Flights from St. Louis to Phoenix Sky Harbor Airport - Compare and Save

If you’d like to withdraw some cash at STL, you’ll be able to do so with ease, given that this airport is full of operational ATMs. The ATMs are located near Gate A10 in Concourse A, the Mid-Level Stage of Terminal 1, Gate C15 in Concourse C, Gate E20 in Terminal 2, and the entrance doors of Terminal 2.

The most convenient way to travel from St. Louis to STL is by taxi. This is because, aboard one of the taxis present in St. Louis, you’ll be able to travel comfortably with all your luggage from your preferred pickup point to the entrance of STL’s terminals.

If you feel a bit unwell while on your flight from STL to PHX, before departing PHX, you can receive a quick medical check-up at XpresCheck. Located on Level 3 of Terminal 4, this clinic boasts well-trained professionals.

In case you’d like to pray, meditate, or gather your thoughts before departing PHX, you’ll be able to do so, given that PHX has a chapel on Level 3 of Terminal 4. It’s worth mentioning that you can pray at this chapel, regardless of your faith, as it is an interfaith chapel.

Among airlines operating St. Louis to Phoenix Sky Harbor Intl Airport flights:

• Southwest: offers free seat selection
• American Airlines: offers extra legroom; offers free seat selection

Extra legroom and free seat selection availability depends on fare class and route.

2 airlines operate flights between St. Louis and Phoenix Sky Harbor Intl Airport. The airlines offering nonstop flights on this route include:

• Southwest
• American Airlines

Flights from St. Louis to Phoenix Sky Harbor Intl Airport usually depart from Lambert-St Louis (STL) and arrive at Phoenix Sky Harbor Intl (PHX).

Here are some options for this route, based on selected ticket types and cabin classes:

• Southwest: a cabin bag and a checked bag in Economy Class
• American Airlines: a cabin bag and a checked bag in Economy Class
• JetBlue: a cabin bag in Economy Class class

Bag allowance can vary by ticket type, cabin class, route and airline, so travelers should check the fare details before booking.

Two cabin classes are available on flights from St. Louis to Phoenix Sky Harbor Intl Airport:

• Economy Class
• Business Class

On this route, layover flights are cheaper than nonstop options on average. Layover fares average $247 round-trip via Las Vegas Harry Reid Intl (LAS), compared to $382 for nonstop.

There is no standard. Checked-bag policies vary by airline on this route. Most carriers charge $45–$100 for the first checked bag in economy. Premium fares and elite-status bookings typically include a free checked bag.

The Boeing 737 MAX 8 family is used most often on this route, operated mainly by Southwest. Other aircraft seen on the route include Boeing 737-800 Passenger/BBJ2 (winglets) variants.

One-stop flights from St. Louis to Phoenix Sky Harbor Intl Airport most commonly connect through:

• Denver Intl (DEN) - 61% of one-stop connections
• Las Vegas Harry Reid Intl (LAS) - 27% of one-stop connections
• Dallas/Fort Worth (DFW) - 4% of one-stop connections
• Houston George Bush Intcntl (IAH) - 2% of one-stop connections

Denver Intl (DEN) handles the largest share of one-stop connections on this route.

Yes. Being flexible with your travel dates can save you up to 14% on the St. Louis to Phoenix Sky Harbor Intl Airport route. Friday is the cheapest departure day at $338 round-trip on average, while Sunday is the most expensive at $392, a difference of $54. KAYAK's flexible dates feature shows options up to 3 days before and after your selected dates, making it easier to compare nearby fares.

Morning is the busiest departure period on St. Louis to Phoenix Sky Harbor Intl Airport flights, with 51% of flights leaving in that window. Afternoon departures account for 33%, evening flights for 16%, and night flights for 0%.

Some of the most popular sights in Phoenix Sky Harbor Intl Airport are Phoenix Convention Center, Chase Field and Camelback Ranch. These are among the most viewed places in Phoenix Sky Harbor Intl Airport on KAYAK.

These are the earliest and latest flight times available from St. Louis to Phoenix Sky Harbor Intl Airport:

• Earliest: departs at 5:05 am and lands at 8:30 am
• Latest: departs at 10:45 pm and lands at 2:10 am.

The flight takes about 3h 25m.

Last-minute fares on this route - booked within 2 weeks of departure - run 16% above the route average of $367. Book 10 weeks before departure for the lowest fares.

A nonstop flight from St. Louis to Phoenix Sky Harbor Intl Airport takes 3h 25m, covering 1,258 miles.

No, a passport is not required for this domestic route, but you will need a real ID-compliant driver's license, a state ID, or another TSA-accepted form of identification.

Yes. Based on fares seen in the past 5 days, round-trip prices on this route showed a wide range, from about $264 to $1,995. That means the highest observed fare was about 8x higher than the lowest one.

One-way fares from St. Louis to Phoenix Sky Harbor Intl Airport are currently lower than usual. Average one-way flight prices are about $173, which is 19% below the typical average for this route.

Flying via Houston George Bush Intcntl (IAH) gives the shortest average 1-stop total travel time at 6h 10m, compared with 6h 47m via Minneapolis St Paul (MSP) and 6h 57m via Salt Lake City (SLC).

Phoenix Sky Harbor Intl Airport is 2 hours behind St. Louis (Mountain Time vs Central Time). Plan for the time shift when scheduling connections or first-day activities.

Phoenix Sky Harbor Intl Airport (PHX) hosts 5 major car rental companies, with daily rates starting from around $18 for economy cars. Top options include:
• NU Car
• Easirent
• Thrifty
• Dollar
• Hertz

Round-trip flights from St. Louis to Phoenix Sky Harbor Intl Airport range from $282 to $451, with an average of $367 over the past 12 months. Anything below $282 counts as a good deal.

Two airlines offer in-flight Wi-Fi on St. Louis to Phoenix Sky Harbor Intl Airport flights:

• • American Airlines
• • JetBlue