Best Flights starting from $335
from$335economy
Denver (DEN)
Sun, May 17
Roundtrip
St Louis (STL)
Sat, May 23
from$344economy
Denver (DEN)
Mon, May 18
Roundtrip
St Louis (STL)
Sun, May 24
from$359economy
Denver (DEN)
Sat, May 23
Roundtrip
St Louis (STL)
Fri, May 29
from$365economy
Denver (DEN)
Thu, May 21
Roundtrip
St Louis (STL)
Wed, May 27
from$379economy
Denver (DEN)
Fri, May 22
Roundtrip
St Louis (STL)
Thu, May 28
from$403economy
Denver (DEN)
Wed, May 20
Roundtrip
St Louis (STL)
Tue, May 26
from$705economy
Denver (DEN)
Tue, May 19
Roundtrip
St Louis (STL)
Mon, May 25
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Other Destinations
Denver (DEN) to Kansas City (MCI) in May from $28
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Denver (DEN) to Phoenix (PHX) in May from $28
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Denver (DEN) to New Orleans (MSY) in May from $42
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Denver (DEN) to Atlanta (ATL) in May from $44
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Denver (DEN) to Los Angeles (LAX) in May from $48
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Denver (DEN) to Las Vegas (LAS) in May from $56
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Flights from Other Cities
Charlotte (CLT) to St Louis (STL) in May from $70
From $70
San Antonio (SAT) to St Louis (STL) in May from $76
From $76
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
Seattle (SEA) to St Louis (STL) in May from $86
From $86
Hartford (BDL) to St Louis (STL) in May from $90
From $90
✈️ Flight Guide: Denver (DEN) → St Louis (STL)
Complete travel information for your May journey
In May, Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) is a popular short-haul domestic route with multiple daily nonstop flights. Average airborne time is about 1 hour 50 minutes to 2 hours 10 minutes; expect slightly longer block times due to taxi and weather buffers. May is spring travel season—book 3–6 weeks in advance for the best fares and consider midweek departures for savings. Denver area travelers often originate from Boulder, Colorado Springs, Fort Collins or mountain resort towns (Vail, Aspen) to catch DEN flights. Use fare alerts, check Southwest and United for competitive nonstop fares, and book refundable or flexible fares if traveling around Memorial Day. Call-to-action: Compare DEN→STL May flight prices now and secure a nonstop seat for your spring trip.
Departing from Denver (DEN) FAQs
Security wait times at Denver International Airport (DEN) in May typically range from 10 to 35 minutes for TSA PreCheck and 20 to 60 minutes for standard lanes, with mornings and early evenings the busiest. Spring travel and weekend spikes around Memorial Day can increase wait times, so arrive 90–120 minutes before a domestic departure to be safe. Check real-time TSA wait updates and sign up for mobile alerts for the latest gate and security information.
A nonstop flight from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) averages about 1 hour 50 minutes to 2 hours 10 minutes depending on routing and winds. Airlines often publish scheduled block times near two hours, so factor in boarding and taxi times when planning connections. For the best matching flights in May, compare nonstop schedules from United, Southwest, and American.
Yes—several carriers operate nonstop routes between Denver International Airport (DEN) and St. Louis Lambert International Airport (STL) in May, with multiple daily departures depending on the airline. Southwest and United commonly offer daily nonstop service, while schedules expand around holiday weekends and spring travel. Always check airline timetables and book direct flights early to secure preferred departure times and lower fares.
Denver International Airport (DEN) provides extensive ground transportation options year-round, including the A Line commuter rail to downtown Denver, rideshare pickup zones, airport shuttles, car rentals, and taxi services. In May, increased spring tourism means shuttles to nearby destinations like Boulder and Colorado Springs can fill up—reserve transfers in advance. For faster access to downtown Denver or nearby cities, consider the RTD A Line train or pre-booked ride-hailing services.
The busiest travel days in May are typically Fridays and Sundays around Memorial Day weekend and Mother’s Day weekend, as leisure travelers and families fly between Denver and St. Louis. Midweek departures (Tuesday–Thursday) usually have lower fares and seat availability, making them ideal for budget travelers. Use flexible date searches and price alerts to find cheaper DEN→STL tickets in May.
Denver International Airport (DEN) serves as a hub for travelers connecting to or from nearby major cities such as Boulder, Colorado Springs, Fort Collins, and popular mountain destinations like Vail and Aspen. Many passengers travel into DEN from these destinations in May to catch flights to St. Louis Lambert International Airport (STL). If you’re connecting at DEN, allow extra time for transfers during spring events or sudden weather changes.
Arriving at St. Louis Lambert International Airport (STL) in May from Denver International Airport (DEN) is straightforward: expect downtown transfers by MetroLink, taxis, and rideshares with typical transit times of 20–40 minutes. May brings baseball games and spring festivals, which may increase local traffic—plan extra time for ground travel and parking. STL serves as a gateway to nearby cities such as Columbia (MO), Kansas City (MO), and Springfield (IL), so book onward ground transport early. CTA: Reserve your STL airport parking and rideshare pick-up now to avoid delays during May weekends.
Arriving at St Louis (STL) FAQs
The fastest way from St. Louis Lambert International Airport (STL) to downtown St. Louis in May is by rideshare or taxi, typically taking 20–30 minutes without heavy traffic. MetroLink light rail service connects the airport to the Central West End and downtown areas for an inexpensive option, though travel time is closer to 30–40 minutes including transfers. During busy May events or Cardinals home games, allow extra time for road congestion and consider booking rideshare in advance.
May in St. Louis features Major League Baseball home games with the St. Louis Cardinals at Busch Stadium and numerous outdoor festivals and Cinco de Mayo celebrations that can increase local traffic and hotel occupancy. Memorial Day weekend at the end of May often brings higher demand for flights and rental cars, so book early and plan extra ground transfer time. Keep an eye on event calendars and consider arriving a day early if attending large city events.
St. Louis Lambert International Airport (STL) offers dining, retail, free Wi‑Fi, charging stations, family facilities, and car rental services throughout the terminals in May. Seasonal pop-up vendors and outdoor-themed promotions sometimes appear in spring; most lounges and restaurants follow normal operating hours but check ahead for event-day adjustments. For smooth travel, review terminal maps and pre-book parking or rental cars during high-demand May weekends.
In May, the DEN→STL route typically has multiple daily flights, including several nonstop options offered by carriers like Southwest and United—often totaling 2–6 daily frequencies depending on airline schedules. Seasonal demand such as Memorial Day or weekends can increase frequencies temporarily, so check current airline timetables for exact daily counts. Booking early helps secure preferred flight times during May travel peaks.
After arriving at St. Louis Lambert International Airport (STL), travelers often continue to nearby major destinations such as Columbia (MO), Springfield (IL), Kansas City (MO), and tourist spots like the Ozarks or Memphis via connecting ground travel. STL is a regional hub serving both central Missouri and southern Illinois, so many passengers use the airport as a gateway to smaller cities and outdoor destinations. If you’re connecting onward, plan ground logistics and check intercity bus or rental car options.
Rental car counters and on-site parking at St. Louis Lambert International Airport (STL) are generally accessible in May, but demand increases during holiday weekends and major events. Advance reservations for rental cars and online parking pre-bookings are recommended to lock in lower rates and guarantee availability. Consider off-airport lots with shuttle service for longer stays or budget-friendly options during busy May travel periods.
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May Events Impacting DEN–STL Travel — Festivals, Sports, and Holidays
In May, expect increased travel around MLB home schedules for the Colorado Rockies (Denver) and the St. Louis Cardinals—game days can drive local hotel and airport demand. Cinco de Mayo celebrations and Mother’s Day weekend produce higher leisure travel and restaurant reservations. Memorial Day weekend is a major travel peak at the end of May: book flights and ground transportation early, especially for DEN departures and STL arrivals. CTA: Check event dates when booking DEN→STL travel in May to avoid congestion and fare spikes.
Best Time to Fly from DEN to STL in May — Save Money and Avoid Crowds
For DEN→STL travel in May, the best time to fly is midweek (Tuesday–Thursday) and early morning flights to minimize fares and avoid heavy crowds. Book roughly 3–6 weeks before departure to capture typical domestic fare lows; consider flexible dates to spot savings near Memorial Day. Avoid peak Friday/Sunday travel and the weekend surrounding major local events or Cardinals home games to reduce delays and higher prices. CTA: Use fare comparison tools to lock in May midweek departures.
Direct vs Connecting Flights for DEN to STL in May — Which Is Better?
Nonstop flights from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) save time—typically about two hours airborne—making them ideal for business travelers and short trips in May. Connecting itineraries may be cheaper, especially on off-peak days, but add layover time and increase the risk of missed connections if weather affects DEN in spring. Choose nonstops for convenience and reliability; consider well-timed connections only if they significantly reduce cost. CTA: Compare nonstop vs connecting options for your May travel dates and pick the best balance of price and travel time.
Airline Comparison for DEN→STL in May — United, Southwest, American and Frontier
United: Offers frequent nonstop and one-stop options with broad connectivity; typically reliable timing but higher fares vs low-cost carriers. Southwest: Known for multiple daily nonstop flights, free first two checked bags, and flexible change policies—often the best value for families traveling DEN→STL in May. American: May offer one-stop service and competitive fares on certain dates—useful if you prefer AAdvantage benefits. Frontier: Budget fares with à la carte add-ons (seat selection, bags); may be cheapest if traveling light and flexible. CTA: Compare real-time fares for your May travel dates and factor baggage and change fees into your total cost comparisons.
Seasonal Travel Tips for Flying DEN to STL in May — Weather, Packing, and Airport Advice
May weather: Denver can be variable—sunny warm days mixed with cool nights and occasional late snow—so pack layers and a light waterproof jacket. St. Louis is typically mild to warm with spring showers; an umbrella and breathable clothing work well. At Denver International Airport (DEN), allow extra time for winter-to-spring runway operations and possible weather delays in early May; at St. Louis Lambert International Airport (STL), book ground transport early on event-heavy days. CTA: Pack layers, set flight status alerts, and arrive early to the airport to ensure smooth May travel.
DEN to STL Flight Time and Schedules in May — Typical Durations and Frequency
Nonstop flights from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) normally have airborne times around 1 hour 50 minutes to 2 hours 10 minutes, with scheduled block times near two hours. In May, airlines often maintain multiple daily frequencies, increasing capacity for holiday weekends. Peak departure windows include early morning and late afternoon; mid-day flights may be slightly less crowded and cheaper. For connections, allow at least 90 minutes at DEN for domestic-to-domestic transfers during spring travel. CTA: Check live airline timetables for May departures and select a nonstop to save time.
How to Find Cheap Flights from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) in May
To find cheap flights from Denver International Airport (DEN) to St. Louis Lambert International Airport (STL) in May, search flexible dates and set price alerts 3–6 weeks before departure. Midweek departures (Tuesday–Thursday) and red-eye/early-morning flights often cost less; consider Southwest and Frontier for competitive fares and unbundled baggage options. Use incognito browsing or fare-aggregator tools, compare round-trip vs one-way pricing, and sign up for airline flash-sale alerts for DEN→STL deals. CTA: Set fare alerts now and check alternate nearby airports if flexible—this can lower your May travel costs.