Best Flights starting from $160
from$160economy
Phoenix (PHX)
Sat, May 2
Roundtrip
St Louis (STL)
Fri, May 8
from$160economy
Phoenix (PHX)
Fri, May 8
Roundtrip
St Louis (STL)
Thu, May 14
from$172economy
Phoenix (PHX)
Fri, May 1
Roundtrip
St Louis (STL)
Thu, May 7
from$180economy
Phoenix (PHX)
Mon, May 4
Roundtrip
St Louis (STL)
Sun, May 10
from$180economy
Phoenix (PHX)
Tue, May 5
Roundtrip
St Louis (STL)
Mon, May 11
from$180economy
Phoenix (PHX)
Wed, May 6
Roundtrip
St Louis (STL)
Tue, May 12
from$230economy
Phoenix (PHX)
Thu, May 7
Roundtrip
St Louis (STL)
Thu, May 14
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Other Options for This Route
Other Destinations
Phoenix (PHX) to Las Vegas (Any) in May from $46
From $46
Phoenix (PHX) to San Diego (SAN) in May from $46
From $46
Phoenix (PHX) to Los Angeles (LAX) in May from $51
From $51
Phoenix (PHX) to Las Vegas (LAS) in May from $52
From $52
Phoenix (PHX) to Cleveland (CLE) in May from $56
From $56
Phoenix (PHX) to Washington, D.C. (BWI) in May from $80
From $80
Flights from Other Cities
Fort Lauderdale (Any) to St Louis (STL) in May from $80
From $80
Fort Lauderdale (FLL) to St Louis (STL) in May from $86
From $86
Atlanta (Any) to St Louis (STL) in May from $126
From $126
Washington, D.C. (BWI) to St Louis (STL) in May from $140
From $140
Houston (IAH) to St Louis (STL) in May from $140
From $140
Dallas (DFW) to St Louis (STL) in May from $147
From $147
✈️ Flight Guide: Phoenix (PHX) → St Louis (STL)
Complete travel information for your May journey
May in Phoenix brings warm, sunny conditions ideal for travel from Phoenix Sky Harbor International Airport (PHX), but also rising passenger counts around Memorial Day weekend. Expect nonstop and connecting PHX to STL flights, with nonstop options primarily on Southwest and American Airlines; average nonstop flight time is about 2 hours 50 minutes to 3 hours. For May savings, book 3–8 weeks in advance, fly midweek, and compare flexible-date fares. Use airport amenities — lounges, restaurants, and efficient ground transport options like the PHX Sky Train — to streamline your departure. If traveling to nearby destinations (Scottsdale, Sedona, Grand Canyon), allow extra time for car rentals and shuttle pickups as demand climbs in late spring. Book now to lock in cheap flights from PHX to STL this May and check carrier baggage policies before heading to the terminal.
Departing from Phoenix (PHX) FAQs
Phoenix Sky Harbor International Airport (PHX) typically sees peak travel times on weekday mornings between 6:00 AM and 9:00 AM and in the late afternoon from 4:00 PM to 7:00 PM. In May, travel increases on long weekends and around Memorial Day, so expect added crowds and longer security lines during holiday periods. Arrive at least 90 minutes before domestic departures to allow time for parking, security, and shuttle transfers.
To find cheap PHX to STL flights in May, compare fares on aggregators like Google Flights and Skyscanner, set price alerts, and book 3–8 weeks in advance for the best May deals. Consider flying midweek (Tuesday or Wednesday) and check low-cost carriers such as Southwest and discount fares on American Airlines. Use flexible date searches and sign up for airline newsletters to catch fare sales and last-minute discounts.
Phoenix Sky Harbor International Airport (PHX) offers multiple ground transportation options including light rail connections via the PHX Sky Train to Valley Metro Rail, rideshare pickup zones, on-site rental car centers, taxis, and hotel shuttles. In May, higher tourism volumes mean rental car availability can be limited, so reserve vehicles early and consider prepaid parking or off-airport shared shuttles. For downtown Phoenix, the light rail and rideshares are usually fastest during weekday peak times.
Yes — Phoenix Sky Harbor International Airport (PHX) is served by nonstop flights to Lambert-St. Louis International Airport (STL) typically offered by Southwest Airlines and American Airlines, with frequency varying in May. Nonstop durations average about 2 hours 50 minutes to 3 hours depending on winds and aircraft type. If you need a specific nonstop schedule for your travel dates, check airline timetables or online flight search tools for real-time availability.
Baggage and carry-on policies are set by the airline, not Phoenix Sky Harbor International Airport (PHX); expect Southwest to include two free checked bags, while American and other legacy carriers often charge for checked baggage on basic economy fares. In May, verify your carrier’s baggage rules before packing, and allow extra time if you need to drop checked luggage at busy counters. Remember that weather in Phoenix may prompt sunscreen and light layers in carry-on bags rather than heavy coats.
Phoenix Sky Harbor International Airport (PHX) features multiple dining and shopping options, credit-card lounges such as American Airlines Admirals Club and contract lounges in Terminal 3, plus free Wi-Fi throughout the terminals. In May, outdoor travel season brings more passengers, so lounge occupancy can increase; consider arriving earlier or using day passes. Family facilities, nursing rooms, and pet relief areas are available across terminals to improve your May travel experience.
May is a popular month to arrive at Lambert-St. Louis International Airport (STL) thanks to pleasant spring weather and baseball season. Nonstop flights from Phoenix Sky Harbor International Airport (PHX) are common and get you into town quickly; average flight time hovers around 2 hours 50 minutes to 3 hours. Once you land, use MetroLink, rideshares, or short-term rentals to reach Riverfront attractions, Forest Park, and nearby suburbs. For best value, prebook parking or rental cars and check MLB game schedules if you plan to attend a Cardinals game. Book your May arrival plans now and compare transit options to save time and money after flying into STL.
Arriving at St Louis (STL) FAQs
Lambert-St. Louis International Airport (STL) is typically busy in May due to spring travel and regional events, but arrival procedures remain straightforward with efficient baggage claim and ground transport options. Plan for potential afternoon thunderstorms in the St. Louis area that can cause brief delays; monitor your flight status and contact your carrier if you have tight ground connections. Once landed, passengers can access rental cars, rideshares, public transit, and airport shuttles to reach downtown St. Louis and surrounding cities.
From Lambert-St. Louis International Airport (STL) you can take rideshares, taxis, shared shuttles, or drive — the typical ride to downtown St. Louis is 15–25 minutes depending on traffic. MetroLink light rail connects the airport to the greater St. Louis transit network for an economical option, though schedules may vary; check local transit updates in May for service hours. For travelers heading to nearby destinations like St. Charles or Chesterfield, a rental car or rideshare is usually the most convenient choice.
Yes — direct nonstop flights between Phoenix Sky Harbor International Airport (PHX) and Lambert-St. Louis International Airport (STL) are commonly available in May, with carriers like Southwest and American operating the route. Nonstop flights typically last about 2 hours 50 minutes to 3 hours, though exact duration depends on routing and winds. Always confirm schedules for your exact travel date, as frequency can change around holiday weekends in May.
After arriving at Lambert-St. Louis International Airport (STL), travelers commonly access downtown St. Louis, the Delmar Loop, Forest Park, St. Charles, Chesterfield, Columbia (MO), and even weekend trips to Branson. May is an excellent month for riverfront activities, Cardinals baseball games, and day trips to nearby wineries or scenic parks. Plan activities with local transit or by renting a car — traffic is generally lighter than summer but can increase around Memorial Day events.
Lambert-St. Louis International Airport (STL) offers short-term parking and economy lots with shuttle service; booking online in advance can secure lower rates, especially around high-demand dates in May. For cheaper alternatives, compare off-site private parking lots with shuttle service and prepay when possible. If you are being picked up, use designated cell phone waiting areas to avoid long-term parking fees.
May in St. Louis brings mild to warm days with temperatures typically in the 60s to 80s °F and a chance of spring thunderstorms, so pack a light rain jacket and layered clothing. Expect variable evenings and occasional humid days; bring comfortable walking shoes for exploring riverfront parks and city neighborhoods. Check the hourly forecast before departure to adjust clothing and travel timing, and allow a little extra time for ground transport during storm-prone hours.
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May Events & Festivals — Phoenix and St. Louis Travel Calendar for PHX–STL Travelers
May is a lively travel month for both Phoenix and St. Louis. In St. Louis, Major League Baseball season (St. Louis Cardinals games) increases weekend demand and can push hotel prices higher; check the Cardinals schedule when booking PHX–STL flights. Phoenix hosts numerous Cinco de Mayo celebrations and outdoor festivals in May, increasing outbound and inbound traffic at Phoenix Sky Harbor International Airport (PHX). Memorial Day weekend is a major travel spike on the PHX–STL route, so plan and book early if your May travel overlaps with holiday festivities. For event-driven travel, secure flights and hotels well in advance and consider flexible fares or refundable options.
Best Time to Fly PHX to STL in May — Dates, Days & Booking Window
The best time to fly PHX to STL in May is mid-month on weekdays, particularly Tuesday and Wednesday departures, which tend to be cheaper and less crowded. For Memorial Day weekend or other holiday travel in May, book at least 6–8 weeks in advance to avoid price spikes. Early-morning flights are preferred to minimize the chance of weather delays in the St. Louis area. Use fare watchers and flexible-date searches to lock in optimal May fares and times.
Direct vs Connecting Flights — PHX to STL in May
Choosing between direct and connecting PHX–STL flights in May depends on your priorities: nonstop flights save time (about 2 hours 50 minutes–3 hours) and reduce the risk of missed connections, while connecting itineraries can be cheaper—especially on legacy carriers during sales. If you prioritize speed, book nonstop service on Southwest or American. If price is paramount and you don’t mind an extended travel day, look for one-stop options via major hubs like Dallas, Phoenix (if returning), or Chicago, but leave ample layover time to account for potential May weather-related delays in the Midwest. Always check the total travel time and connection duration when comparing options.
Airline Comparison: Southwest vs American vs Others for PHX–STL (May)
Southwest Airlines is often the top pick for budget-conscious travelers on the PHX–STL route in May because of its frequent nonstop schedules and two free checked bags. American Airlines also offers competitive nonstop options with a more traditional fare structure; basic economy fares may exclude checked bags. Delta and United typically provide connecting itineraries via hub cities and can be a good value if you find a sale or need flexible award travel. For May travel, compare total trip cost including baggage fees, seat selection, and loyalty benefits — and book early for Memorial Day travel to secure the best combination of price and convenience.
Seasonal Travel Tips for PHX to STL in May — Weather, Packing & Airport Advice
Pack light, layered clothing for May: expect hot, dry days in Phoenix (upper 70s–90s °F) and mild to warm, sometimes humid conditions in St. Louis with a chance of afternoon thunderstorms. Bring sunscreen and a reusable water bottle for Phoenix; pack a compact rain jacket and umbrella for St. Louis. Arrive at Phoenix Sky Harbor International Airport (PHX) at least 90 minutes before domestic departures, and plan ground transport from Lambert-St. Louis International Airport (STL) with MetroLink, rideshare, or prebooked shuttles. To save money, prepay for parking or use off-airport parking and compare baggage-inclusive fares for May travel. CTA: Review your carrier’s baggage rules and weather forecast before heading to the airport to ensure a smooth May trip.
PHX to STL Flight Time & Schedules — May Nonstop Duration and Frequency
Average nonstop flight time from Phoenix Sky Harbor International Airport (PHX) to Lambert-St. Louis International Airport (STL) in May is roughly 2 hours 50 minutes to 3 hours. Daily frequencies vary by carrier — Southwest and American commonly offer direct services while other airlines provide one-stop itineraries via hubs. To reduce the chance of weather-related delays, consider morning departures when air traffic and thunderstorm activity are typically lower in the Midwest during May. For real-time schedules and specific flight numbers, search carrier timetables or use flight tracking tools prior to booking.
Cheap PHX to STL Flights in May — Deals, Booking Windows & Hacks
Looking for cheap flights from Phoenix Sky Harbor International Airport (PHX) to Lambert-St. Louis International Airport (STL) this May? Start by searching flexible dates and setting fare alerts on Google Flights and Skyscanner. Book 3–8 weeks ahead for May departures, favor midweek flights (Tuesday/Wednesday), and check Southwest for two-free-checked-bag savings that reduce total trip cost. Consider early-morning or red-eye options to find lower fares, and join airline loyalty programs for member-only sales. CTA: Set a price alert now to catch May PHX–STL fare drops and compare nonstop vs connecting prices to unlock the best deal.