Price observed over the last 3 months for a round trip.
Compare all flight tickets and find cheap flights from St Louis to Phoenix
The cheapest flights right now
St Louis – Phoenix
Outbound – Nov 5, 2026
direct
3h 25m Return – Nov 12, 2026
direct
3h 0m $424
today
St Louis – Phoenix
Outbound – Nov 6, 2026
direct
3h 20m Return – Nov 11, 2026
direct
2h 50m $436
today
* Prices are in USD per passenger, including taxes, for a round trip. Prices are based on searches carried out within the last 72 hours. Please note that availability and ticket prices are subject to change and should not be considered as the final price quoted.
Cheapest flight tickets
$210
Average price of a round trip
$251
Average flight ticket price recorded over the last 3 months for a round trip.
Flight duration
3h34
A flight from St Louis to Phoenix takes on average 3h34.
Best time
August
According to user searches, the ideal month to go to Phoenix is August.
Tips for finding a cheap flight from St Louis to Phoenix
Check out our tips for booking your flight to Phoenix (USA) from St Louis (USA) at the cheapest possible price.
Usually, the cheapest month to pick up a ticket on this route is October, with an average flight ticket price of $229 (calculation over the last two years). The most touristic season corresponds to the months of October, September and October.
For the cheapest flights, it is advisable to buy your ticket at least 21 days before the departure date.
The airline offering the cheapest flight tickets is Frontier Airlines. A ticket from the airline Frontier Airlines to Phoenix costs on average $248.
The airlines that offer the most flights are American Airlines and American Airlines.
Price of flight tickets from St Louis to Phoenix
Here is some information and tips to know before booking your flight:
- Flight ticket prices range from $210 to $439
- The average price of a flight ticket is about $251
- Prices are lowest for stays in the month of October
- The month in which booking a ticket is cheaper is: October
info departure city :
St Louis, USA
airports :
Lambert-St. Louis International Airport (STL)
St. Louis Downtown Airport (CPS)
Spirit of St. Louis Airport (SUS)
local time :
St Louis is a city in the country USA, the time zone is [[timezone]]. In St Louis, it is currently {fromLocalTime}, the temperature is on average 23°C, with a minimum of 18°C and a maximum of 26°C.
The city of St Louis has 3 airport(s): Lambert-St. Louis, St. Louis Downtown and Spirit of St. Louis
destination info :
Phoenix, USA
airports :
Phoenix Sky Harbor International Airport (PHX)
Falcon Field Airport (MSC)
local time :
Phoenix is in the country USA, the time zone is [[timezone]]. In Phoenix, it is currently {toLocalTime}, the temperature is on average 25°C, with a minimum of 20°C and a maximum of 32°C.
The city of Phoenix has 2 airport(s): Phoenix Sky Harbor and Falcon Field
Useful info about Phoenix
What is the least touristic period to go to Phoenix?
If you want to visit Phoenix during the least touristic period, choose the month of August.
What is the most popular time to travel to Phoenix?
In Phoenix, the most popular month is October. It is during this period that the prices offered by airlines are also the highest.
When should I book my flight from St Louis to Phoenix?
According to our data, it is recommended to book your flight 21 days before your departure. If you book your flight ticket 4 weeks before your departure, you may find a price below average. You can also choose morning flights that are 100% cheaper than afternoon and evening flights. The cheapest day to book a flight from St Louis to Phoenix is Tuesday.
What are the arrival and destination airports when traveling between St Louis and Phoenix?
When you leave, you can leave from Lambert-St. Louis, and you will arrive at Phoenix Sky Harbor.
How to reach St Louis airport from the city centre?
The airport Lambert-St. Louis is located 20 km, St. Louis Downtown is located 7 km or Spirit of St. Louis is located 45 km from the city centre. You can access it by using public transportation, taking a taxi, or renting a car.
Are there other means of transportation to go from St Louis to Phoenix?
Airplane is the only means of transportation listed on Liligo for this journey.
Are there big differences in weather between St Louis and Phoenix?
In summer, the average temperature is 35°C in Phoenix and 25°C in St Louis. The average rainfall in summer is 24 mm in Phoenix and 135 mm in St Louis. In summer, it is warmer in Phoenix and it rains less in Phoenix. In winter, it is colder in Phoenix and it rains more in St Louis.
