Direct & Connecting Flights from RDU to SEA: Your Ultimate Guide
Cheapest flight found
$145
Last updated Mar 13, 2026
Prices by Month
Price History
Tracking the May 7, 2026 departure — the cheapest date we found.
Price Behavior: RDU → SEA
Based on 6 months of fare data collected by Trip Manta.
Lowest Fare
$145
Highest Fare
$264
Median Fare
$244
Price Spread
$119
Prices vary significantly — hourly tracking is especially valuable here.
Cheapest month to fly: May 2026 (from $145)
Most expensive month: September 2026 (from $264)
Biggest price drop caught: $42 between consecutive checks
Most frequent cheapest airline: Southwest
What This Means for You
Flights from Raleigh to Seattle range from $145 to $264, a $119 spread across the months we track. If your dates are flexible, May 2026 tends to have the lowest fares. Because prices on this route change significantly, setting up hourly price alerts gives you the best chance of catching a short-lived drop before it corrects. We have caught drops as large as $42 between hourly checks on this route.
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From
Raleigh (RDU)
To
Seattle (SEA)
Airport Information
Raleigh (RDU)
Raleigh-Durham International Airport (RDU) serves as a primary aviation hub for North Carolina, consistently ranked as one of the best-performing airports in the country for passenger satisfaction. It features two main terminals: Terminal 1, which primarily hosts Southwest Airlines, and the larger, modern Terminal 2, which handles most other domestic and international carriers. The airport offers a variety of amenities, including high-speed Wi-Fi, local North Carolina-themed retail shops, and a diverse selection of restaurants that highlight the region's famous barbecue and southern hospitality.
Seattle (SEA)
Seattle-Tacoma International Airport (SEA), the largest airport in the Pacific Northwest region, is a bustling international gateway located conveniently between the cities of Seattle and Tacoma. The airport is a major hub for Alaska Airlines and a significant West Coast international gateway for Delta Air Lines, featuring a wide array of amenities including live musical performances in the terminals and premium lounges. Travelers arriving here can enjoy stunning views of Mt. Rainier on clear days and benefit from a streamlined baggage claim process and efficient ground transportation links to the entire Puget Sound area.
Frequently Asked Questions
How long is the average flight from RDU to SEA?
A non-stop flight typically takes between 5 hours and 45 minutes to 6 hours and 15 minutes, while connecting flights usually range from 8 to 11 hours depending on layover duration.
Which airlines offer non-stop flights from Raleigh to Seattle?
Alaska Airlines is the primary carrier currently offering year-round non-stop service between Raleigh-Durham and Seattle-Tacoma.
What is the time difference between Raleigh and Seattle?
Seattle is in the Pacific Time Zone, which is 3 hours behind Raleigh’s Eastern Time Zone.
Is there public transportation from Seattle airport to downtown?
Yes, the Sound Transit Link light rail runs directly from the airport to downtown Seattle, with trains departing every 8 to 15 minutes.
When is the best time to book flights for this route?
For the most competitive rates, it is recommended to book your tickets at least 4 to 6 weeks in advance, especially if you are traveling during the busy summer months.
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Our Methodology
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