Submit feedbackSubmit feedbackComplete travel information for your September journey
September is a shoulder month for departing William P. Hobby Airport (HOU); demand is moderate after summer travel peaks and before fall holidays. Southwest and other carriers commonly operate nonstops to Denver International Airport (DEN), giving you multiple scheduling choices and competitive fares. Expect warm Houston weather—check local storm advisories during hurricane season and subscribe to airline alerts for flight changes. For the best value on HOU to DEN flights in September, compare fares early, consider midweek departures, and reserve parking or a rideshare pickup spot in advance. Ready to find cheap HOU to DEN flights in September? Search now for nonstop and one-stop options and lock in a flexible fare.
In September, the best ways to reach William P. Hobby Airport (HOU) are by rideshare, airport shuttle, or car—traffic is typically lighter after the late-summer rush. Hobby is conveniently located inside Houston city limits with quick access from the I-45 and I-69 corridors; if you’re coming from nearby destinations like Galveston, Sugar Land, The Woodlands, Austin or San Antonio, allow extra time for weekday congestion. Book a rideshare or reserve an off-site parking spot in advance for the most stress-free airport transfer.
For flights from William P. Hobby Airport (HOU) to Denver International Airport (DEN) in September, arrive at least 90 minutes before domestic departures; during peak morning or holiday weekends give yourself 2 hours. September typically has moderate TSA wait times, but special events (like NFL home games in Houston) can increase traffic—check the TSA Wait Times and HOU flight status before leaving. Arriving early helps with baggage check, security screening, and potential last-minute fare upgrades.
Yes—nonstop flights between William P. Hobby Airport (HOU) and Denver International Airport (DEN) are commonly offered by major low-cost and legacy carriers, with multiple daily options in September. Southwest often operates direct flights from HOU, and other carriers may add seasonal nonstops; check schedules and book early for the best nonstop times and fares. Nonstop flights reduce total travel time and are usually the quickest way to travel between Houston and Denver.
William P. Hobby Airport (HOU) offers short-term curbside drop-off and several on-site parking options including hourly and daily lots; in September availability is generally good but can tighten during major local events. Use the airport’s official parking map to reserve parking and follow posted rules for passenger pick-up—rideshare pickup zones are designated and may require short walks or shuttle transfers. For cheap long-term parking book ahead and compare off-site lots that offer free shuttles.
September in Houston can be humid with occasional tropical systems; while most days are fine for travel, severe weather or tropical storms can cause delays or cancellations at William P. Hobby Airport (HOU). Airlines and airports post advisories during tropical activity—subscribe to flight alerts and monitor NOAA and local traffic updates. For September travel, purchase flexible fares or travel insurance if you’re concerned about storm-related disruptions.
From William P. Hobby Airport (HOU) you can conveniently serve Houston metro areas and nearby destinations such as Galveston, Sugar Land, The Woodlands, Beaumont, and Austin for connecting ground travel. Travelers often use HOU as an entry point for South Texas and Gulf Coast trips, then fly onward to Denver International Airport (DEN) for Rocky Mountain access. If you’re planning a multi-city itinerary in September, consider scheduling extra time for ground transfers between these cities and HOU.
September is a popular time to arrive at Denver International Airport (DEN) thanks to cooler temps and early fall color in the Rockies. Expect reliable ground transport options—RTD A Line to downtown Denver, rental-car counters, and multiple shuttle services to mountain towns. Because Denver sits at high elevation, pack layers for temperature swings and allow one hour time difference from Houston (Mountain Time). If your itinerary includes Vail, Breckenridge, Aspen or Rocky Mountain National Park, book shuttles or rental cars ahead; weekend availability tightens in late September as leaf change peaks.
Arriving at Denver International Airport (DEN) in September typically means cooler, drier air than Houston and a one-hour time difference (Denver is Mountain Time). Expect efficient baggage claim and good ground-transport options—rental cars, regional shuttle services to Boulder, Aurora, Colorado Springs, and rideshares. September is prime for fall foliage planning in the nearby Rocky Mountains, so build in extra time if your itinerary includes day trips to Vail, Breckenridge, or Rocky Mountain National Park.
Denver International Airport (DEN) is large; the walking time from many arrival gates to baggage claim can be 10–20 minutes depending on your gate and terminal area, with automated train options for concourse transfers. Plan up to 30 minutes for connections that require baggage claim, and use airport maps to find the quickest route. If you have mobility concerns, request assistance ahead of arrival for expedited transfers and gate-to-baggage support.
Denver International Airport (DEN) offers multiple ground-transport options including Denver RTD A Line trains to Union Station, regional shuttles to Boulder and Colorado Springs, rental cars, taxis, and rideshares. In September, demand for shuttles to mountain towns increases as travelers chase fall colors, so reserve shared shuttles or rental cars in advance. For downtown arrivals, the RTD A Line is a cost-effective way to reach Union Station in about 37 minutes.
September at Denver International Airport (DEN) is generally mild with lower snow risk, but sudden mountain weather and afternoon thunderstorms can cause delays—especially for flights connecting to mountain airports. Winds and convective weather in the Rockies sometimes create turbulence or flow restrictions; check FAA status and airline advisories the day of travel. Travelers should allow buffer time for connections and monitor flight-tracking apps for real-time updates.
From Denver International Airport (DEN), you can easily access downtown Denver, Boulder, Aurora, Colorado Springs, Fort Collins, Vail, Breckenridge, and Aspen with car or shuttle connections. September is ideal for road trips to Rocky Mountain National Park and nearby mountain towns for fall colors and outdoor activities. Plan transfers in advance—rental cars and shuttle services book up on fall weekends—especially for trips to high-altitude destinations.
If you arrive on a domestic connection into Denver International Airport (DEN) the process is straightforward: proceed to baggage claim and ground transportation. For international travelers connecting through Denver, U.S. customs will be processed at the first point of entry—if DEN is that airport, allow additional time for CBP processing. In September, passenger volumes are moderate but can spike during events; enroll in expedited programs (Global Entry, TSA PreCheck) for faster processing and check airline notes for international transfer rules.
September in Denver offers live sports and fall festivities that attract travelers on the HOU to DEN route. Highlights often include Colorado Rockies regular-season baseball at Coors Field (catch games in early–mid September), community Oktoberfest events starting in late September, and weekend leaf-peeping drives to nearby Vail and Breckenridge as aspens begin to change color. Denver restaurant weeks and local craft beer pop-ups also occur intermittently; consult Visit Denver for exact dates. These events can increase flight and hotel demand—book HOU to DEN travel early if your trip coincides with local festivals or popular weekends.
September is an excellent time to fly from William P. Hobby Airport (HOU) to Denver International Airport (DEN): it’s shoulder season with fewer crowds than summer, often lower fares than holiday months, and pleasant weather in Denver for outdoor activities. Best days to fly for lower fares are typically Tuesday and Wednesday; early-morning departures reduce the chance of weather delays. For the lowest prices, book 3–8 weeks ahead of your September travel date and use fare alerts to catch short promotions. If you want peak fall color in the mountains, aim for late September but book early to secure shuttle or rental car availability.
Nonstop flights from William P. Hobby Airport (HOU) to Denver International Airport (DEN) are the fastest option, typically 2 hours 45 minutes–3 hours and reduce the risk of missed connections. Connecting itineraries can be cheaper, especially during sales, but add total travel time and increase the chance of delays—particularly if a single tight connection is involved. In September, weather-related connecting delays are less likely than winter storms, but afternoon thunderstorms in the Rockies can still create ripple effects. Choose nonstop for reliability and time savings; choose a connecting flight when you want the lowest fare and can allow buffer time.
Southwest Airlines often offers the most frequent nonstop service between William P. Hobby Airport (HOU) and Denver International Airport (DEN), with free two-checked-bags policy that can save families money. United and American may provide one-stop options via their hubs and sometimes nonstops; these carriers often include faster loyalty rewards for frequent flyers. Frontier can be the lowest base fare but charges for carry-ons and seat assignments—factor those fees into total price. For September travel, weigh total cost (fares + baggage + seat choice) and schedule convenience; loyalty program status or flexibility needs may make a higher base fare worthwhile. CTA: Compare prices across carriers and check baggage rules before booking HOU to DEN flights this September.
Pack layers for HOU to DEN travel in September—Houston will likely be warm and humid while Denver can be cool, especially in the morning and evening. Stay hydrated and avoid excessive alcohol on arrival to reduce altitude-related symptoms at Denver’s 5,430-foot elevation; take it easy on your first day if you plan mountain activities. Book morning flights to minimize weather-related delays and secure rental cars or shuttle reservations ahead of time for weekend mountain trips. CTA: Check flight status 24 hours before your HOU to DEN departure and pack a lightweight jacket for Denver temperatures.
Nonstop flight time from William P. Hobby Airport (HOU) to Denver International Airport (DEN) is typically about 2 hours 45 minutes to 3 hours, depending on winds and routing. September schedules usually include multiple daily nonstops—early-morning and late-afternoon are common—so travelers can pick times that minimize layovers. Remember Denver is one hour behind Houston in September (Mountain Daylight Time vs Central Daylight Time). If you book a one-stop itinerary, allow at least 90–120 minutes for a domestic connection; for tight international arrivals into HOU that connect to DEN, plan extra buffer time. For up-to-date times, check airline schedules and real-time trackers the day before travel.
To find cheap flights from William P. Hobby Airport (HOU) to Denver International Airport (DEN) in September, start searching 3–8 weeks before departure and be flexible with dates—midweek flights are often cheapest. Southwest frequently offers competitive nonstop fares from HOU to DEN; Frontier and United also operate the route with seat sales. Set fare alerts on Google Flights or Skyscanner and compare one-way vs round-trip pricing. Use a mix of primary keywords (HOU to DEN flights, cheap flights HOU DEN) and LSI terms like low-cost carriers, airfare deals, nonstop flight discounts, and shoulder-season fares. Book early-morning departures to catch lower prices and avoid afternoon weather disruptions in Denver. CTA: Sign up for fare alerts now to lock in the best HOU to DEN September deals.