Best Flights starting from $197
Economy
Washington, D.C. (BWI)
Wed, May 6
Roundtrip
Seattle (SEA)
Fri, May 15
Economy
Washington, D.C. (BWI)
Sat, May 9
Roundtrip
Seattle (SEA)
Mon, May 18
Economy
Washington, D.C. (BWI)
Mon, May 11
Roundtrip
Seattle (SEA)
Wed, May 20
Economy
Washington, D.C. (BWI)
Tue, May 5
Roundtrip
Seattle (SEA)
Thu, May 14
Economy
Washington, D.C. (BWI)
Sun, May 10
Roundtrip
Seattle (SEA)
Tue, May 19
Economy
Washington, D.C. (BWI)
Fri, May 8
Roundtrip
Seattle (SEA)
Sun, May 17
Other Options for This Route
Other Destinations
Washington, D.C. (BWI) to San Juan (SJU) in May from $111
From $111
Washington, D.C. (BWI) to Charleston (CHS) in May from $153
From $153
Washington, D.C. (BWI) to Tampa (TPA) in May from $168
From $168
Washington, D.C. (BWI) to Reno (RNO) in May from $173
From $173
Washington, D.C. (BWI) to Las Vegas (LAS) in May from $186
From $186
Washington, D.C. (BWI) to San Juan (SJU) in May from $241
From $241
Flights from Other Cities
Denver (DEN) to Seattle (SEA) in May from $156
From $156
Minneapolis (MSP) to Seattle (SEA) in May from $176
From $176
San Jose (SJC) to Seattle (SEA) in May from $177
From $177
Washington, D.C. (IAD) to Seattle (SEA) in May from $197
From $197
St Louis (STL) to Seattle (SEA) in May from $203
From $203
Colorado Springs (COS) to Seattle (SEA) in May from $208
From $208
✈️ Flight Guide: Washington, D.C. (BWI) → Seattle (SEA)
Complete travel information for your May journey
Departing from Washington, D.C. (BWI) FAQs
To find the cheapest economy fares from Seattle-Tacoma International Airport (SEA) to Las Vegas Harry Reid International Airport (LAS) in March, search flexible-date calendars on Google Flights, Momondo, and Skyscanner and set price alerts two to eight weeks in advance. Midweek departures (Tuesdays and Wednesdays) typically yield lower fares; consider low-cost carriers like Spirit and Frontier or sales from Alaska and Southwest for the best economy deals. Compare baggage and seat fees to ensure the apparent lowest fare remains the cheapest.
Downtown Seattle to Seattle-Tacoma International Airport (SEA) is served by Link Light Rail (direct service to the airport), shuttle buses, rideshares (Uber/Lyft), taxis, and private car/parking options. Link Light Rail is economical and predictable during peak hours, while shuttles and ride-shares can be faster late at night or with heavy luggage. If you plan to park, reserve airport parking in advance to lock in lower daily rates.
In December, Seattle-Tacoma International Airport (SEA) can experience fog and occasional wind or snow events that may cause delays, though heavy snow is less frequent than further east. Airlines and SEA publish winter operational plans; check flight status before travel and allow extra connection time if weather advisories are in effect. Consider travel insurance or refundable/easily-changeable fares for December trips.
Seattle-Tacoma International Airport (SEA) serves nearby major cities and destinations such as Bellevue (WA), Tacoma (WA), Everett (WA), Portland (OR), and Vancouver, British Columbia (Canada). Travelers often combine trips to Portland and Vancouver with SEA departures to extend itineraries or find alternate low-cost routing options. Use flexible multi-city search tools to compare fares from nearby airports if you’re seeking cheaper economy flights.
For early morning economy flights from Seattle-Tacoma International Airport (SEA), check in online and use mobile boarding passes to speed up your process, arrive 90 minutes before domestic departures, and utilize TSA PreCheck if you have it. Bring clear, organized travel documents and pack liquids/meds in carry-on compliant containers to breeze through security. Review SEA's current terminal maps and gate assignments before heading to the airport to avoid last-minute gate changes.
From Seattle-Tacoma International Airport (SEA), Alaska Airlines and Delta often provide strong economy value with included carry-on and moderate legroom, while Southwest and Spirit focus on rock-bottom base fares—Southwest includes two free checked bags which can be cheaper overall. For lowest base fares prioritize Spirit or Frontier, but factor in add-on fees for bags and seat selection to compare total trip cost. Use price comparison tools and read airline fee policies before booking.
Arriving at Seattle (SEA) FAQs
For the cheapest economy fares to Las Vegas Harry Reid International Airport (LAS) from Seattle-Tacoma International Airport (SEA) in September, target midweek travel after Labor Day and book 4–8 weeks in advance. Use fare comparison engines, enable price alerts for SEA–LAS routes, and consider low-cost carriers for base fares while checking total costs for baggage and seat fees.
Las Vegas Harry Reid International Airport (LAS) offers taxis, ride-shares (Uber/Lyft), shuttle buses, and rental cars for travel to the Las Vegas Strip, Henderson, North Las Vegas, and downtown. Public bus routes such as the RTC operate from the airport and are the most budget-friendly; shared shuttles are a low-cost option if you’re heading directly to major resorts.
Yes — March often features major conventions and spring break crowds in Las Vegas, which can push economy fares up to Las Vegas Harry Reid International Airport (LAS). Check major events like trade shows or sports tournaments and book early if traveling in March; mid-March can be particularly busy during collegiate spring breaks and conventions.
From Las Vegas Harry Reid International Airport (LAS), travelers access nearby cities and top destinations including Henderson (NV), North Las Vegas (NV), Los Angeles (CA), Phoenix (AZ), and the Grand Canyon/Hoover Dam region. These nearby hubs often appear in multi-city itineraries and can be included as day trips or extended stays.
Las Vegas Harry Reid International Airport (LAS) features multiple food courts, cafes, convenience shops, and lounge access for purchase—ideal for economy arrivals. Budget travelers can use airport shuttles and public transit to reduce costs, and vendors on the Strip often offer cheaper dining than airport options if you head into the city.
Baggage and seat policies for economy fares arriving at Las Vegas Harry Reid International Airport (LAS) depend on the carrier; low-cost airlines frequently charge separately for checked bags and preferred seating while legacy carriers may include one carry-on. Always review the airline’s economy fare rules before booking to avoid surprise fees and consider bundled or refundable fares if you need flexibility.
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Events & Festivals Impacting SEA and LAS Economy Fares
Major conventions, music festivals, and sporting events in Las Vegas (CES in January, March conventions, and summer residencies) and regional events near Seattle (Seafair in July, major conferences) can spike fares and hotel costs. Monitor event calendars and book early if traveling during major shows. Nearby cities like Los Angeles (LAX) and Phoenix (PHX) also influence demand for flights into Las Vegas and from Seattle.
Best Time to Fly — Seattle-Tacoma International Airport (SEA) to Las Vegas Harry Reid International Airport (LAS)
The best time to fly for lowest economy fares is typically late January through mid-February and September through early November (shoulder seasons). Avoid major event weeks, spring break, and holiday weekends when fares to Las Vegas Harry Reid International Airport (LAS) spike. Book midweek departures and early-morning flights for the best price-performance balance.
Direct vs. Connecting — SEA to LAS Economy Flight Comparison
Direct nonstop flights from Seattle-Tacoma International Airport (SEA) to Las Vegas Harry Reid International Airport (LAS) are faster (approx. 2.5 hours) and more convenient, but connecting itineraries through hubs sometimes offer cheaper economy fares. Connecting flights add travel time and risk of missed connections, so weigh base fare savings against added time and potential layover costs.
Seasonal Travel Tips — SEA to LAS Economy Guide
For winter travel, pack layers for Seattle chill and cooler evenings in Las Vegas and allow extra time for possible SEA fog or regional storms. In summer, Las Vegas can be extremely hot—pack sun protection and plan for late-night excursions. Shoulder seasons (spring and fall) offer the best balance of price and comfort; book midweek and check alternate nearby airports like Portland (PDX) and Vancouver (YVR) for lower fares.
Flight Time & Schedules — Seattle-Tacoma International Airport (SEA) to Las Vegas Harry Reid International Airport (LAS)
Nonstop flight time from Seattle-Tacoma International Airport (SEA) to Las Vegas Harry Reid International Airport (LAS) averages around 2 hours 30 minutes to 2 hours 50 minutes depending on winds and routing. Major carriers operate multiple daily frequencies—Alaska Airlines, Southwest, Delta, and Spirit typically provide several nonstop options daily, while connections through hubs like Denver (DEN) or Salt Lake City (SLC) increase total travel time.
Cheap Economy Flights — SEA to LAS Savings Guide
To secure the cheapest economy flights, combine flexible dates, multi-airport searches (including nearby cities such as Bellevue, Tacoma, Portland, and Vancouver), and fare alerts. Prioritize midweek departures, sign up for airline newsletters (Alaska, Southwest, Spirit), and compare total trip costs including baggage and seat fees. Use incognito mode sparingly and verify cancellation or change policies for the cheapest economy fares.