Best Flights starting from $198
from$198economy
St Louis (STL)
Sat, Aug 15
Roundtrip
Denver (DEN)
Thu, Aug 20
from$198economy
St Louis (STL)
Sun, Aug 16
Roundtrip
Denver (DEN)
Fri, Aug 21
from$198economy
St Louis (STL)
Mon, Aug 17
Roundtrip
Denver (DEN)
Sat, Aug 22
from$200economy
St Louis (STL)
Thu, Aug 13
Roundtrip
Denver (DEN)
Tue, Aug 18
from$200economy
St Louis (STL)
Fri, Aug 14
Roundtrip
Denver (DEN)
Wed, Aug 19
from$203economy
St Louis (STL)
Tue, Aug 11
Roundtrip
Denver (DEN)
Sun, Aug 16
from$203economy
St Louis (STL)
Wed, Aug 12
Roundtrip
Denver (DEN)
Mon, Aug 17
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Other Options for This Route
Other Destinations
St Louis (STL) to Las Vegas (LAS) in August from $229
From $229
St Louis (STL) to Las Vegas (Any) in August from $233
From $233
St Louis (STL) to Seattle (SEA) in August from $254
From $254
St Louis (STL) to Miami (MIA) in August from $418
From $418
St Louis (STL) to Cancun (CUN) in August from $441
From $441
St Louis (STL) to Athens (ATH) in August from $529
From $529
Flights from Other Cities
Memphis (MEM) to Denver (DEN) in August from $194
From $194
Grand Rapids (GRR) to Denver (DEN) in August from $278
From $278
Syracuse (SYR) to Denver (DEN) in August from $329
From $329
Winnipeg (YWG) to Denver (DEN) in August from $516
From $516
Detroit (DTW) to Denver (DEN) in September from $120
From $120
Appleton (ATW) to Denver (DEN) in September from $160
From $160
✈️ Flight Guide: St Louis (STL) → Denver (DEN)
Complete travel information for your August journey
Departing from St Louis (STL) FAQs
To find the cheapest economy flights from Denver International Airport (DEN), search flexible dates and compare low-cost carriers like Frontier, Spirit, and Southwest against legacy carriers. Use fare alerts, book 1–3 months in advance for domestic travel or 2–6 months for international routes, and consider flying midweek or in shoulder seasons. Also check nearby airports and consider connections to lower fares.
Economy fares often include a personal item but not checked bags on low-cost carriers out of Denver International Airport (DEN). Expect variable seat pitch and optional fees for advanced seat selection, priority boarding, and checked baggage; always check the fare rules before purchase. For the cheapest total cost, compare bundled fares versus a la carte add-ons.
Denver International Airport (DEN) offers budget-friendly economy flights to major destinations including Las Vegas (LAS), Los Angeles (LAX), Phoenix (PHX), San Francisco (SFO), Seattle (SEA), Chicago (ORD), Dallas/Fort Worth (DFW), New York (JFK/EWR), and Orlando (MCO). These routes often have multiple daily flights and strong competition that drives down fares.
For July travel out of Denver International Airport (DEN), last-minute deals are rarer due to peak summer demand; check flash sales from low-cost carriers and midweek departures. Use flexible-date searches and consider early-morning or late-night flights to find lower fares. Sign up for carrier alerts and follow airline social channels for quick sale notifications.
Denver International Airport (DEN) sits at high altitude, which means cabin pressurization and dehydration can feel more pronounced; pack a refillable water bottle and layer clothing for rapid temperature changes. For checked luggage, note that weight limits remain the same, but consider lighter packing for domestic economy to avoid baggage fees on budget carriers.
Yes, Denver International Airport (DEN) is served by the A Line train and bus networks connecting downtown Denver, Aurora, and nearby suburbs. The RTD A Line offers an affordable, frequent option to reach the airport instead of rideshares or parking, which helps keep the total cost of a cheap economy trip down. Check schedules and early-morning service times if you have an early flight.
Arriving at Denver (DEN) FAQs
'Cheapest Economy Arrival (ECONOMY)' refers to arriving at your destination on the lowest available economy fare, often with restrictions like non-refundable tickets, limited changes, and fewer included amenities. From Denver International Airport (DEN), these fares are most common on routes served by budget carriers and during off-peak travel windows. Always read fare rules to avoid surprise fees on the arrival end.
Common cheap economy arrival cities from Denver International Airport (DEN) include Las Vegas (LAS), Phoenix (PHX), Los Angeles (LAX), San Francisco (SFO), Seattle (SEA), Dallas/Fort Worth (DFW), Chicago (ORD), and New York (JFK/EWR). These hubs have high-frequency service and competition that drives down economy-class arrival fares.
Yes, the cheapest economy arrivals typically come with baggage fees, fees for advanced seat selection, and stricter change/cancellation policies. Some budget carriers also charge for onboard refreshment purchases and priority boarding. Factor these ancillary fees into your total arrival cost when comparing advertised fares.
For December travel, secure the cheapest economy arrivals early — aim to book by October or November to avoid holiday price spikes. If you must travel close to the holidays, consider flying on off-peak dates like early December or the days immediately after major holidays. Also, look for connecting itineraries that split the peak travel burden and lower arrival fares.
To minimize ground transport costs after an economy arrival, research public transit, off-airport shuttles, and shared rides that serve major arrival cities. For example, many airports offer express trains or buses to downtown areas at a fraction of rideshare or taxi prices. Pre-booking airport shuttles or using transit passes can reduce overall trip costs.
Cheapest economy seats often feature reduced legroom and minimal recline compared with premium economy or exit-row seating. To improve the arrival experience, choose early seat selection if available, bring a travel pillow and light blanket, and consider paying a small fee for extra legroom if the journey is long. Booking flights with newer aircraft or slightly higher economy fare classes sometimes improves comfort without a large price jump.
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Events & Festivals Affecting Cheap Economy Fares from Denver International Airport (DEN)
Best Time to Fly Cheap from Denver International Airport (DEN)
The best times to find cheap economy flights from Denver International Airport (DEN) are typically during shoulder seasons: late January to mid-March and September to mid-November. Weekdays (Tuesday–Thursday) and early-morning flights often offer lower fares. For ski destinations, book earlier in the season; for beach destinations book 1–3 months ahead. Use fare alerts and flexible-date searches; these tactics capture industry sales and last-minute reductions.
Direct vs Connecting Flights from Denver International Airport (DEN) — Which Is Cheaper?
Connecting flights often yield the cheapest economy fares compared with nonstop flights, especially when routed through major hubs like Dallas/Fort Worth (DFW), Phoenix (PHX), Las Vegas (LAS), or Minneapolis (MSP). Nonstop flights from Denver International Airport (DEN) are more convenient and might be worth the premium for short trips. If saving money is the priority, consider one-stop itineraries, but leave at least 60–90 minutes for domestic connections and factor in the risk of missed connections when booking separate tickets. CTA: Compare nonstop and connecting cheap economy flights from Denver International Airport (DEN) to find the best balance of time and price.
Airline Comparison — Best Budget & Legacy Carriers from Denver International Airport (DEN)
Compare total costs (fare + baggage + seats) from Denver International Airport (DEN) to find the cheapest economy carrier for your itinerary.
Seasonal Travel Tips for Cheap Economy Travelers from Denver International Airport (DEN)
Use these seasonal tips to find and book the cheapest economy flights from Denver International Airport (DEN) and travel smarter year-round.
Flight Times & Schedules from Denver International Airport (DEN) — Typical Durations to Major Cities
Typical flight durations from Denver International Airport (DEN) vary by destination and route competition. Many cheap economy routes have multiple daily departures, especially to high-demand cities.
Cheap Flights Guide — How to Score the Lowest Economy Fares from Denver International Airport (DEN)
To get the cheapest economy flights from Denver International Airport (DEN), combine flexible dates, fare alerts, and competition awareness. Primary strategies: book 1–3 months ahead for domestic economy, 2–6 months for international; target midweek flights; use split-ticketing or one-way buys on different carriers when legal; and monitor low-cost carriers like Frontier, Spirit, and Southwest for flash sales. Secondary tactics include clearing cookies for fresh price checks, using incognito mode for comparison, and leveraging credit card or loyalty program offsets. LSI keywords: low-cost carriers, fare alerts, last-minute deals, shoulder season. CTA: Compare cheap economy flights from Denver International Airport (DEN) now and sign up for price alerts to catch the best rates.