Best Flights starting from $114
from$114economy
Seattle (SEA)
Tue, Aug 18
One-way
Washington, D.C. (BWI)
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Other Destinations
Seattle (SEA) to Santa Ana (SNA) in August from $120
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Miami (MIA) to Washington, D.C. (BWI) in August from $33
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From $44
Fort Lauderdale (Any) to Washington, D.C. (BWI) in August from $44
From $44
Miami (Any) to Washington, D.C. (BWI) in August from $44
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Atlanta (ATL) to Washington, D.C. (BWI) in August from $84
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Dallas (DFW) to Washington, D.C. (BWI) in August from $244
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✈️ Flight Guide: Seattle (SEA) → Washington, D.C. (BWI)
Complete travel information for your August journey
August travel from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) is characterized by summer demand and warm East Coast weather. Expect busy terminals and higher fares if booking last-minute; for the best availability and price, book 3–8 weeks in advance. Use midweek departures, red-eye options, or one-stop itineraries through hubs like Denver or Chicago to find lower fares. Remember Seattle's nearby destinations (Bellevue, Tacoma, Mount Rainier) and Baltimore/D.C. area attractions (Annapolis, Washington, D.C., Inner Harbor) when planning multi-city trips. Check airline schedules and sign up for fare alerts to lock in cheap flights from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI).
Departing from Seattle (SEA) FAQs
For domestic travel from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) in August, arrive at least 2 hours before your scheduled departure to allow time for check-in, security, and potential summer crowds. August is a peak travel month with summer tourists and events in the Seattle area, so plan extra time if you have checked bags or are traveling during morning rush hours. Check TSA wait times and airport alerts the morning of travel and book parking or rideshare in advance to save time.
Direct or nonstop service between Seattle-Tacoma International Airport (SEA) and Baltimore/Washington International Thurgood Marshall Airport (BWI) can be limited and seasonal. Many travelers find the best schedules with one-stop itineraries via hubs such as Chicago (ORD), Denver (DEN), Atlanta (ATL), or Minneapolis (MSP). Use a flexible date search on Google Flights or airline websites to compare nonstop availability and consider booking early for the most nonstop options.
A nonstop flight (if available) typically takes about 5 hours and 10–30 minutes of air time, but most common one-stop itineraries range from 6 to 9 hours total including layovers. Remember Seattle is in Pacific Time and Baltimore is in Eastern Time, so you will gain three hours on arrival. Check the flight duration and layover times when booking to choose the fastest option.
Seattle-Tacoma International Airport (SEA) is served by Link Light Rail, shuttles, taxis, rideshares, and rental cars, making it easy to reach downtown Seattle, Bellevue, Tacoma, or nearby suburbs. The Link Light Rail offers a reliable, cost-effective connection especially during August when traffic increases due to tourism and festivals. Reserve airport parking or car rentals in advance during peak summer travel to secure better rates.
August is one of the busiest months at Seattle-Tacoma International Airport (SEA) due to summer tourism, festivals like late-August Bumbershoot-era events, and travelers heading to the Pacific Northwest. To avoid delays, travel at off-peak times (midweek or red-eye flights), use TSA PreCheck or CLEAR if available, and check real-time airport alerts for gate or security changes. Book early morning flights when possible and sign up for airline notifications to stay updated on schedule changes.
Besides downtown Seattle, travelers use Seattle-Tacoma International Airport (SEA) to access Bellevue, Tacoma, Snoqualmie, Mount Rainier National Park, Whidbey Island, and Vancouver, BC. Many visitors combine flights with Pacific Northwest road trips to Portland, the San Juan Islands, or the Olympic Peninsula. When booking flights from SEA, consider multi-destination itineraries to explore nearby attractions after your flight.
August arrivals at Baltimore/Washington International Thurgood Marshall Airport (BWI) from Seattle-Tacoma International Airport (SEA) should plan for hot, humid weather and mid-summer travel volumes. Use the BWI Rail Station shuttle for fast connectivity to Amtrak and MARC trains, or pre-book rideshares and shuttles to reach downtown Baltimore, Annapolis, or Washington, D.C. Expect possible afternoon thunderstorms—leave extra time for ground transfers and consider midweek travel to avoid weekend congestion. If exploring the wider region, include Annapolis, the Chesapeake Bay, and Washington, D.C. on your itinerary and book popular attractions and Orioles game tickets in advance.
Arriving at Washington, D.C. (BWI) FAQs
Baltimore/Washington International Thurgood Marshall Airport (BWI) offers multiple ground transportation options including the MARC/Amtrak rail link via the BWI Rail Station shuttle, MTA buses, rideshares, taxis, shuttles, and car rentals. Travel time to downtown Baltimore is typically 15–25 minutes by car, while Washington, D.C. can take 35–60 minutes depending on traffic. During August, factor in weekend events and highway congestion; pre-book shuttles or check train schedules for smoother transfers.
For domestic flights from Seattle-Tacoma International Airport (SEA), baggage claim at Baltimore/Washington International Thurgood Marshall Airport (BWI) follows standard domestic procedures: collect checked bags at the designated carousel and proceed to ground transportation. There is no customs clearance required for domestic U.S. flights. If you are connecting to an international flight or arriving from an international origin, follow signage for customs and immigration as necessary.
For connections at Baltimore/Washington International Thurgood Marshall Airport (BWI) during August, allow at least 60–90 minutes for domestic-to-domestic connections and 90–120 minutes for international connections. Summer weather or traffic delays can affect arrival times, so build in extra buffer if you have checked luggage or tight minimum connection times. Use airline apps for gate changes and real-time notifications to manage short connections effectively.
August in the Baltimore/Washington area is typically hot and humid with occasional afternoon thunderstorms that can cause short delays. Expect daytime highs in the 80s–90s°F (high 20s to mid-30s°C) and pack lightweight clothing and rain protection if you plan outdoor activities. Check local weather forecasts before travel and monitor flight status for possible thunderstorm-related delays.
Baltimore/Washington International Thurgood Marshall Airport (BWI) serves Baltimore, Washington, D.C., Annapolis, Columbia, Towson, and the Maryland suburbs, and is a gateway to the Chesapeake Bay and Eastern Shore. Visitors often combine flights to BWI with trips to National Harbor, Annapolis Navy attractions, Washington, D.C. museums, and the Baltimore Inner Harbor. When planning August activities, check event calendars for Orioles baseball games and nearby summer festivals.
Peak arrival times at Baltimore/Washington International Thurgood Marshall Airport (BWI) in August are generally late morning and early evening as travelers arrive from cross-country flights and summer weekend traffic. To avoid crowds, choose mid-afternoon arrivals or late-night arrivals, and consider off-peak weekdays. Sign up for airline notifications and use mobile boarding passes to expedite your arrival experience.
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August Events & Festivals Near Seattle-Tacoma International Airport (SEA) and Baltimore/Washington International Thurgood Marshall Airport (BWI)
August is a lively month for both the Pacific Northwest and the Mid-Atlantic. Near Seattle-Tacoma International Airport (SEA), travelers can enjoy late-summer outdoor activities, neighborhood street fairs, and music events—Bumbershoot-style arts/music programming often occurs around late August or Labor Day weekend. Arriving at Baltimore/Washington International Thurgood Marshall Airport (BWI), you’ll find Orioles baseball at Oriole Park in Camden Yards, waterfront concerts at the Inner Harbor, and the Maryland State Fair in nearby Timonium (typically late August). Plan ahead for event-related traffic and book accommodations early if your trip coincides with major festivals or sporting events.
Best Time to Fly SEA to BWI in August — Save Money and Avoid Crowds
For August travel from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI), flying midweek (Tuesday–Thursday) and choosing early morning departures typically results in lower fares and smaller crowds. Late August—after schools resume—can also yield better prices and quieter airports. If your schedule allows, consider red-eye flights to maximize savings and reduce daytime travel stress. Always compare flexible date pricing and book at least 3–8 weeks ahead to lock in competitive summer fares.
Direct vs Connecting Flights: Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI)
Choosing between direct and connecting flights from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) depends on your priorities. Nonstop flights (when available) minimize travel time and reduce the risk of missed connections, but they can be more expensive or seasonal. Connecting itineraries via Chicago (ORD), Denver (DEN), Atlanta (ATL), or Minneapolis (MSP) often offer more schedule flexibility and lower fares but add layover time. For August travel, if you value speed and convenience, prefer nonstop options; if you prioritize cost savings and broader schedule choices, consider one-stop flights and plan your layover length carefully.
Airline Comparison for Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI)
Major carriers servicing the SEA to BWI corridor in August include American Airlines, Delta Air Lines, United Airlines, and Alaska Airlines, often with one-stop connections through their respective hubs. Alaska Airlines—Seattle’s hometown carrier—offers strong West Coast service and partner codeshares, though nonstop options to BWI may be limited. Delta and American commonly route through ATL and ORD respectively, while United often connects through DEN or ORD. Compare ticket prices, checked-bag allowances, change policies, and elite status benefits before booking; use airline apps for real-time gate and delay updates.
Seasonal Travel Tips for Flying from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) in August
Pack for contrasting climates when flying from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) in August: light, breathable clothing for humid East Coast heat and a light jacket for cooler Seattle evenings. Expect occasional afternoon thunderstorms in the Baltimore area—leave extra transfer time and monitor weather-related advisories. Use TSA PreCheck and CLEAR at SEA to shorten security lines, and download your airline's app for mobile boarding passes and real-time updates. Stay hydrated on long flights, and consider flexible tickets or travel insurance for summer disruptions.
Flight Time and Typical Schedules for Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI)
A nonstop flight between Seattle-Tacoma International Airport (SEA) and Baltimore/Washington International Thurgood Marshall Airport (BWI), when offered, typically takes about 5 hours and 10–30 minutes of flight time. Most travelers will encounter one-stop itineraries ranging from 6 to 9+ hours total, depending on layover lengths in hubs such as Chicago O'Hare (ORD), Denver (DEN), Atlanta (ATL), or Minneapolis (MSP). Remember Seattle operates on Pacific Time and Baltimore on Eastern Time — you will gain three hours upon arrival. Flight schedules in August tend toward morning departures and late-afternoon/evening arrivals; check airline timetables for seasonal nonstop services or added summer frequencies.
How to Find Cheap Flights from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) in August
To score cheap flights from Seattle-Tacoma International Airport (SEA) to Baltimore/Washington International Thurgood Marshall Airport (BWI) in August, monitor flexible date calendars and set fare alerts on Google Flights, Skyscanner, and Kayak. Consider flying midweek (Tuesday–Thursday), choosing red-eye departures, or routing through alternative regional airports like Ronald Reagan Washington National (Reagan National/DCA) or Washington Dulles (IAD) for competitive fares. Book roughly 3–8 weeks in advance for domestic summer travel, and compare single-carrier versus multi-carrier itineraries for the best savings. Use airline loyalty points or credit-card travel portals to reduce costs and check budget-friendly carriers for one-stop options. Act fast when you see a deal, as August inventory moves quickly.