Submit feedbackComplete travel information for your September journey
September departures from Denver International Airport (DEN) combine pleasant weather with steady flight schedules. Nonstop services to Baltimore/Washington International Thurgood Marshall Airport (BWI) operate multiple times weekly, and early-September weekends can see higher demand due to late-summer escapes to the mountains. For the best fares on DEN to BWI flights in September, target midweek departures and book 3–8 weeks ahead. If you're connecting, allow at least 60–90 minutes for domestic connections at DEN during peak times. Nearby destinations accessed from DEN include Denver, Boulder, Colorado Springs, Vail and Aspen — ideal for fall hikes and leaf-peeping. Ready to book? Search DEN to BWI flights now and compare nonstop and connecting options to find the best September deal.
Denver International Airport (DEN) is well connected by highway (E-470 and Peña Boulevard), rideshares, taxis, and the RTD A Line commuter rail from Denver Union Station. In September, expect mild mornings and cooler evenings, so plan extra travel time for early fog or late-afternoon thunderstorm traffic; book an airport shuttle or take the A Line for predictable commute times. Book Denver to Baltimore flights in September early for the best fares.
Yes — nonstop flights between Denver International Airport (DEN) and Baltimore/Washington International Thurgood Marshall Airport (BWI) are commonly scheduled through major carriers, with multiple weekly nonstop options in September. Availability can fluctuate, so compare nonstop and one-stop fares and book early to lock in lower September prices.
A nonstop flight from Denver International Airport (DEN) to Baltimore/Washington International Thurgood Marshall Airport (BWI) usually takes about 3 hours 45 minutes to 4 hours in September, depending on winds and routing. Connecting itineraries can range from 5 to 8+ hours door-to-door, so check schedules and preferred layover airports.
September in Denver features warm days, cool nights, and lower humidity with an increased chance of afternoon thunderstorms early in the month. Weather-related delays are possible but less frequent than summer; high-altitude winds and occasional thunderstorm activity can add minor disruptions, so allow buffer time when connecting. For the latest conditions, check DEN weather updates and airline alerts before travel.
From Denver International Airport (DEN) travelers commonly access Denver, Boulder, Colorado Springs, Vail, Aspen, and Rocky Mountain National Park. In September, these destinations are popular for fall colors, hiking, and outdoor recreation, so consider renting a car early and check mountain pass conditions.
To find cheap DEN to BWI flights in September, search 3–8 weeks in advance, compare low-cost carriers and legacy airlines, use midweek departure dates, and sign up for price-drop alerts. Consider nearby airports, flexible dates, and fare comparison tools to secure the best Denver to Baltimore airfare. Book now to grab competitive September deals.
September arrivals at Baltimore/Washington International Thurgood Marshall Airport (BWI) combine mild coastal weather with the start of the fall cultural season. Travelers from Denver International Airport (DEN) will find multiple ground-transportation choices including the BWI Marshall Rail Station for efficient trips to Washington, D.C., and frequent shuttles and rideshare options to downtown Baltimore and Annapolis. Expect slightly humid conditions with pleasant evenings — ideal for exploring the Inner Harbor or catching an Orioles game at Camden Yards. For the best deals on DEN to BWI flights in September, compare arrival times and train connections, and consider midweek travel for lower fares. Ready to arrive? Book your DEN to BWI flight today and review train and shuttle schedules for seamless transfers.
Baltimore/Washington International Thurgood Marshall Airport (BWI) offers rental cars, taxis, ride-hailing services, Amtrak and MARC train connections via the BWI Rail Station, and frequent airport shuttles. In September, expect typical commuter traffic to Washington, D.C. and Annapolis during morning and evening peaks; plan extra time for travel to these nearby cities.
September around Baltimore and the Washington, D.C. metro area features college and NFL football kickoffs, local seafood and cultural fairs, and outdoor harbor activities in Baltimore. While event dates vary each year, travelers arriving at Baltimore/Washington International Thurgood Marshall Airport (BWI) can enjoy Camden Yards Orioles games, regional fall festivals, and D.C.-area museum exhibitions. Check local event calendars and book early for popular weekend events.
September is rich with seasonal activities. From Denver International Airport (DEN), travelers can access nearby fall hiking, scenic drives to Vail and Aspen for early leaf color, and Colorado Rockies baseball games in downtown Denver. From Baltimore/Washington International Thurgood Marshall Airport (BWI), visitors can enjoy Orioles games at Camden Yards, waterfront events at the Inner Harbor, and cultural offerings across Washington, D.C. and Annapolis, including outdoor concerts and food festivals. Because event dates vary each year, check official city and venue calendars before booking and plan ground transport in advance for busy weekends. CTA: Explore local event calendars to add a festival or game to your DEN–BWI September itinerary.
The best time to fly DEN to BWI in September is midweek (Tuesday–Thursday) and outside major U.S. holiday weekends. Book roughly 3–8 weeks ahead for domestic deals; earlier if traveling around early-September holiday weekends. Early-morning departures often have fewer delays and can be cheaper, while late-afternoon flights are convenient for same-day travelers but may be pricier. Use fare trackers and set flexible-date alerts to capture price drops for September travel. CTA: Set a fare alert now to monitor DEN to BWI September prices.
Nonstop flights from Denver International Airport (DEN) to Baltimore/Washington International Thurgood Marshall Airport (BWI) are the fastest and reduce connection risk, typically lasting about 3 hours 45 minutes to 4 hours. Connecting flights via hubs like Chicago (ORD), Charlotte (CLT), or Dallas (DFW) can be cheaper but increase total travel time and possibility of missed connections, especially if layovers are tight. In September, when weather disruptions are less common than summer thunderstorms, nonstop travel remains the most reliable choice for time-sensitive itineraries. If saving money is the priority, compare one-stop options with longer layovers and pick connections that allow comfortable transfer time. CTA: Compare nonstop and one-stop options for DEN to BWI in September to decide which fits your schedule and budget.
When flying DEN to BWI in September, United often provides nonstop service with a range of fare classes and extensive loyalty benefits for Star Alliance members. Southwest is known for competitive pricing and two-free-checked-bags policy, making it attractive for value-minded travelers. Delta and American may offer one-stop connections through their hubs with varying schedule options; these carriers can be reliable for connections and premium cabin upgrades. Consider baggage rules, change fees, and loyalty program benefits when selecting an airline for your September trip. CTA: Compare fares and baggage policies across carriers before booking your DEN to BWI flight in September.
Pack layers for contrasting conditions: light shirts and shorts for warm Baltimore days, and a fleece or light jacket for cool Denver nights and mountain trips. Bring sunscreen and hydrate before and after flights from Denver International Airport (DEN) due to higher altitude, and plan extra time for airport security lines during early-morning and holiday weekend peaks. For arrivals at Baltimore/Washington International Thurgood Marshall Airport (BWI), consider train or shuttle options to avoid traffic into Washington, D.C., and check MARC/Amtrak schedules in advance. Keep digital copies of travel documents, download airline apps for real-time updates, and set fare alerts to catch last-minute DEN to BWI September deals. CTA: Prepare with our DEN to BWI packing checklist and sign up for flight status alerts before you travel.
Nonstop flights from Denver International Airport (DEN) to Baltimore/Washington International Thurgood Marshall Airport (BWI) generally take about 3 hours 45 minutes to 4 hours in September, depending on winds. Typical schedule windows include early-morning departures (6:00–9:00) for business travelers, mid-day flights (11:00–14:00) for leisure, and evening red-eyes (20:00–23:00) for overnight travel. If you connect, common layover hubs are Chicago O’Hare (ORD), Charlotte (CLT), and Dallas/Ft. Worth (DFW), which can add 1.5–4 hours to total travel time. Note the time zone difference: Denver is on Mountain Daylight Time (MDT) and Baltimore on Eastern Daylight Time (EDT) in September, so BWI local time is two hours ahead of DEN. Check real-time schedules and book flights that align with your ground-transportation plans at destination.
To score cheap DEN to BWI flights in September, search with a 3–8 week booking window and use flexible-date search tools to identify lower-priced midweek itineraries. Sign up for fare alerts for DEN to BWI routes, set price targets on Google Flights and Skyscanner, and compare nonstop versus one-stop itineraries. Flying the day after a holiday or avoiding Friday/Sunday peak travel days will often save money. Consider budget carriers or flight+hotel packages if you need accommodation. CTA: Start a price alert for DEN to BWI flights for September and book when you see a dip in fares.
Pack lightweight layers for warm, humid days and cooler evenings; include a light rain jacket as September can bring occasional coastal storms or showers. Bring comfortable walking shoes for exploring Baltimore's Inner Harbor, a lightweight sweater for air-conditioned museums in Washington, D.C., and adaptors or chargers for long travel days.
Baltimore/Washington International Thurgood Marshall Airport (BWI) is approximately 30–35 miles from downtown Washington, D.C. (about 35–50 minutes by car depending on traffic) and roughly 30 miles from Annapolis (around 35–45 minutes). Use the BWI Marshall Rail Station (Amtrak/MARC) for a reliable link to downtown D.C. in September when traffic can be heavier during commutes and weekend festival traffic.
Yes, several carriers routinely schedule nonstop flights from Denver International Airport (DEN) to Baltimore/Washington International Thurgood Marshall Airport (BWI), particularly in September when demand for coast-to-coast travel remains strong. Check airline schedules and book early for prime arrival times and better pricing on DEN to BWI routes.
