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United Flights from Phoenix (PHX) to St. Louis (STL)

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Amazing United PHX to STL Flight Deals

The cheapest flights to Lambert-St. Louis Intl. found within the past 7 days were $219 round trip and $133 one way. Prices and availability subject to change. Additional terms may apply.

Thu, Dec 24 -
PHX
Phoenix
to
STL
St. Louis
$133

One way

found 18 hours ago

Open PHX to STL flights search result page
Mon, Jan 18 -
PHX
Phoenix
to
STL
St. Louis
$139

One way

found 2 days ago

Open PHX to STL flights search result page
Mon, Dec 21 -
PHX
Phoenix
to
STL
St. Louis
$150

One way

found 2 days ago

Open PHX to STL flights search result page
Sat, Dec 19 -
PHX
Phoenix
to
STL
St. Louis
$164

One way

just found

Open PHX to STL flights search result page
Mon, Feb 15 -
PHX
Phoenix
to
STL
St. Louis
$165

One way

found 3 hours ago

Open PHX to STL flights search result page
Mon, Jan 18 -
PHX
Phoenix
to
STL
St. Louis
$197

One way

found 2 days ago

Open PHX to STL flights search result page
Fri, Dec 11 -
PHX
Phoenix
to
STL
St. Louis
$202

One way

found 18 hours ago

Open PHX to STL flights search result page
Sat, Dec 19 -
PHX
Phoenix
to
STL
St. Louis
$218

One way

just found

Open PHX to STL flights search result page
Wed, Dec 30 - Sat, Jan 2
PHX
Phoenix
to
STL
St. Louis
$219

Roundtrip

found 2 days ago

Open PHX to STL flights search result page
Sun, Dec 6 -
PHX
Phoenix
to
STL
St. Louis
$220

One way

found 3 hours ago

Open PHX to STL flights search result page
Wed, Dec 30 - Sat, Jan 2
PHX
Phoenix
to
STL
St. Louis
$224

Roundtrip

found 2 days ago

Open PHX to STL flights search result page
Fri, Dec 11 - Thu, Dec 24
PHX
Phoenix
to
STL
St. Louis
$229

Roundtrip

found 18 hours ago

Open PHX to STL flights search result page
Thu, Dec 24 -
PHX
Phoenix
to
STL
St. Louis
$133

One way

found 18 hours ago

Open PHX to STL flights search result page
Mon, Dec 21 -
PHX
Phoenix
to
STL
St. Louis
$150

One way

found 2 days ago

Open PHX to STL flights search result page
Sat, Dec 19 -
PHX
Phoenix
to
STL
St. Louis
$164

One way

just found

Open PHX to STL flights search result page
Fri, Dec 11 -
PHX
Phoenix
to
STL
St. Louis
$202

One way

found 18 hours ago

Open PHX to STL flights search result page
Sat, Dec 19 -
PHX
Phoenix
to
STL
St. Louis
$218

One way

just found

Open PHX to STL flights search result page
Wed, Dec 30 - Sat, Jan 2
PHX
Phoenix
to
STL
St. Louis
$219

Roundtrip

found 2 days ago

Open PHX to STL flights search result page
Sun, Dec 6 -
PHX
Phoenix
to
STL
St. Louis
$220

One way

found 3 hours ago

Open PHX to STL flights search result page
Wed, Dec 30 - Sat, Jan 2
PHX
Phoenix
to
STL
St. Louis
$224

Roundtrip

found 2 days ago

Open PHX to STL flights search result page
Fri, Dec 11 - Thu, Dec 24
PHX
Phoenix
to
STL
St. Louis
$229

Roundtrip

found 18 hours ago

Open PHX to STL flights search result page
Mon, Jan 18 -
PHX
Phoenix
to
STL
St. Louis
$139

One way

found 2 days ago

Open PHX to STL flights search result page
Mon, Jan 18 -
PHX
Phoenix
to
STL
St. Louis
$197

One way

found 2 days ago

Open PHX to STL flights search result page
Mon, Feb 15 -
PHX
Phoenix
to
STL
St. Louis
$165

One way

found 3 hours ago

Open PHX to STL flights search result page

FAQs about United Airlines Flights from PHX to STL

What terminal is United Airlines at Phoenix Sky Harbor Airport?

Your boarding pass usually displays which terminal your United Airlines flight will be boarding from at Phoenix, AZ (PHX-Sky Harbor Intl.). It might also be able to provide you with arrival details for St. Louis, MO (STL-Lambert-St. Louis Intl.). If not, you might like to consult your airline before you fly.

Are there United Airlines non-stop flights from PHX to STL?

Unfortunately, you won't find any direct flights between Phoenix, AZ (PHX-Sky Harbor Intl.) and St. Louis, MO (STL-Lambert-St. Louis Intl.) with United Airlines. Be ready to make a stopover if you need to travel on this particular route and airline.

How long is an United Airlines flight from PHX to STL?

Squeeze in some in-flight shut-eye and arrive at your destination relaxed and refreshed. You'll have enough time to do so when traveling with United Airlines between PHX and STL, with the flight taking about 5 hours and 14 minutes.

How many direct and indirect flights does United Airlines fly from PHX to STL?

When jetsetting from PHX to STL, there are 3 United Airlines daily flights to select from.

If I am not able to travel due to COVID-19, can I change my booking to a later date?

For more info about changing your flight to St. Louis, MO (STL-Lambert-St. Louis Intl.), please visit our Customer Service Portal.

What is the best day to buy a plane ticket?

This just in! Airfares offered on Tuesdays tend to be the cheapest, according to flight demand on Travelocity in 2019. Wednesday and Friday prices are also good, but you may want to prepare your budget if booking on a Monday, as data shows the start of the week is when prices are generally at their highest.

What are the cheapest days to fly?

Frequent travelers may already know this, but earlier in the week can be the cheapest time to fly. In 2019, flights departing on a Tuesday were generally the cheapest of the week, whereas you may pay a premium for weekend flights when demand is usually high. On average, tickets were most expensive for Saturday departures, so if you need to fly out on a weekend, you might look for deals ahead of time.

How far in advance can you book a flight?

Trying to figure out how early you should book your flight? It's possible to start comparing international airfares on Travelocity up to 12 months in advance. However, it does depend on the carrier as not all airlines release their prices that far out. According to our 2019 flight demand trends, last minute planners can still bag a bargain with some of the cheapest fares appearing 1-2 weeks prior to their travel dates.

How can I save money on airline tickets?

We'll let you in on a secret...You can save big on flights if you mix and match your airlines and fare types. In fact, travelers who booked flights on Travelocity in 2019 saved nearly 50% when their return flights consisted of two different airlines or fare types.

*According to flight demand on Travelocity.com from January to December 2019. Savings are subject to change based on departure location, date and destination.

Popular United Flight Routes from PHX

Top United Flight Routes from STL

Top Flights for United originating from PHX

*Price based on the lowest price found within past 24 hours and based upon one night stay for two adults over the next thirty days. Prices and availability subject to change. Additional terms may apply.