Cheap flights from St. Louis to Phoenix from $64
This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to Phoenix departing on 9/8. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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How to get the cheapest flight ticket from St. Louis to Phoenix
Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip
What is the cheapest month to fly to Phoenix?
If you are unable to visit Phoenix during the month of July, then departing from St. Louis during the month August is also very affordable. Most momondo users find prices during this month for around $268.
What is the cheapest day to depart on your flight to Phoenix?
On average, the least expensive day to fly to Phoenix from St. Louis is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $375. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from St. Louis because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $494.
What is the cheapest time of day to depart on your flight to Phoenix?
The cheapest time of day to fly to Phoenix is in the afternoon when flights can be purchased for as low as $398. In the morning is when there is more demand to fly to Phoenix, so prices are often more expensive at around $443 per ticket.
What is the cheapest Lambert-St Louis to Phoenix flight route?
Fly from Lambert-St Louis to Phoenix Sky Harbor Intl for the best Lambert-St Louis - Phoenix flight prices
How far in advance should I book a flight to Phoenix?
You are more likely to see cheaper flights to Phoenix from St. Louis when booking 4 weeks ahead of your departure date. In general, you can expect to find flights to Phoenix for around $361 when searching 4 weeks out.However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Phoenix from St. Louis for as low as $334 on momondo.
What cabin class options are available on Lambert-St Louis to Phoenix flights?
There are 3 cabin classes available to choose from on Lambert-St Louis to Phoenix flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.
What is the cheapest airline that flies from Lambert-St Louis to Phoenix?
Spirit Airlines, Southwest, and American Airlines are the most popular carriers operating from Lambert-St Louis to Phoenix
What airlines fly to Phoenix?
American Airlines, Southwest and Frontier are the top three most popular airlines that fly to Phoenix from St. Louis according to our data. American Airlines is the first choice among our users, with 53% of people opting to fly with this airline when traveling to Phoenix. Keep in mind that there are 5 different airlines that fly to Phoenix on a routine basis, so you have a few additional options to choose from.
How many flights depart from St. Louis to Phoenix on average per day?
The number of flights available between St. Louis and Phoenix is 7 per day as of June 2025. The most frequent departure time is 6:00PM, with 36% of daily flights leaving at noon.
How many flights depart from St. Louis to Phoenix on average per week?
The number of flights available between St. Louis and Phoenix is 49 per week as of June 2025. The most frequent departure day is Mon, with 22% of weekly flights leaving on this day.
Cheap St. Louis to Phoenix flight deals and tips
Find info about flight duration, direct flights, and airports for your flight from St. Louis to Phoenix
How far is Lambert-St Louis to Phoenix by plane?
The distance between Lambert-St Louis and Phoenix is about 1269.1 mi. By plane, this route typically takes 3h 10m.
When did momondo last update prices for flights from Lambert-St Louis Airport to Phoenix?
Prices for flights from Lambert-St Louis Airport to Phoenix are refreshed on a daily basis.
How many operators does momondo search for flights from Lambert-St Louis Airport to Phoenix?
The number of operators available for flights from Lambert-St Louis Airport to Phoenix is 5 as of June 2025.
How old do you have to be to fly from Lambert-St Louis Airport to Phoenix?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to Phoenix.
What documentation or ID do you need to fly to Phoenix?
The travel and health documents you'll need for your trip to Phoenix may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Phoenix. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.
Best airlines flying from St. Louis to Phoenix
Compare and see reviews for airlines that fly from St. Louis to Phoenix with momondo
| Airline | Rating | Free Cancellation | Price | ||
|---|---|---|---|---|---|
| PriceFrom $103 | Free Cancellation | Rating 5.9 3,295 reviews | |||
| PriceFrom $152 | Free Cancellation | Rating 7.2 10,000 reviews | |||
| PriceFrom $216 | Free Cancellation | Rating 8.0 7,946 reviews | |||
| PriceFrom $226 | Free Cancellation | Rating 7.4 8,790 reviews | |||
| PriceFrom $290 | Free Cancellation | Rating 8.0 4,287 reviews |
Why use momondo?
Why should I use momondo to find a flight deal from St. Louis to Phoenix?
momondo collates all your flight options in one place and lets you filter them to find the perfect flight from St. Louis to Phoenix. momondo saves you time and could save you money on your trip.
Can I find flights from St. Louis to Phoenix with flexible booking policies on momondo?
Flights from St. Louis to Phoenix with flexible booking policies can be found by using the search form above and then selecting our dedicated flexible booking filter, which will highlight only the flights where this policy is applied.
How can momondo help me find flights from St. Louis to Phoenix?
momondo helps you find the best flight between St. Louis and Phoenix by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.
I’m not ready to book a flight from St. Louis to Phoenix right now. Can momondo alert me if prices change?
Of course. momondo tracks the price of St. Louis to Phoenix flights. All you need is a valid email address and we will do the rest; it is that quick and easy.