San Francisco to Seattle Flights: SFO to SEA Route Guide, Fares & Tips

Route Overview: San Francisco to Seattle

Traveling from the tech hub of Northern California to the Emerald City of the Pacific Northwest is one of the most frequent transit corridors on the West Coast. Whether you are flying for business at Amazon or Microsoft, or visiting the iconic Space Needle, cheap flights from San Francisco to Seattle are readily available through several major carriers. This route connects two major cultural and economic centers, making it a high-frequency corridor with departures nearly every hour during peak travel windows. For personalized assistance with your booking, you can always call 1-800-518-9067 to speak with our travel experts.

Flight duration and schedule

The average flight time for a SFO to SEA nonstop journey is approximately 2 hours and 15 minutes to 2 hours and 30 minutes. Factors like wind speeds and air traffic control patterns at Sea-Tac can influence the exact arrival time. Flights typically begin as early as 6:00 AM and run late into the evening, with the final departures usually leaving San Francisco around 10:30 PM. This robust schedule allows travelers to find a time that fits any itinerary, whether you need a full day in Seattle or a quick evening hop.

Nonstop vs one-stop options

Given the proximity of these two cities, the vast majority of travelers prefer nonstop flights. However, one-stop options are occasionally available, often connecting through cities like Portland (PDX), Sacramento (SMF), or Boise (BOI). While these might save a few dollars during peak holiday periods, they can extend your travel time to 4 or 6 hours. For the best value, most flyers choose the direct route which covers the coastal distance efficiently.

Distance and typical aircraft

The flight distance between San Francisco International Airport and Seattle-Tacoma International Airport is roughly 679 miles. This short-haul route is primarily served by narrow-body aircraft. You will frequently find yourself on a Boeing 737 or an Airbus A320 series jet. Occasionally, regional partners operate Embraer 175 aircraft on this route, which are popular for their 2-2 seating configuration, ensuring no middle seats for passengers.

Airlines, Alliances and Aircraft on the SFO-SEA Route

Several major airlines dominate the skies between SFO and SEA. This competition is excellent for consumers, as it keeps prices for SFO to SEA flights competitive throughout the year. You can view all Faresterminal route guides to compare how this West Coast route stacks up against others like New York to Los Angeles (JFK-LAX) or Los Angeles to New York (LAX-JFK).

Alaska Airlines: The West Coast Specialist

Alaska Airlines considers both SFO and SEA as major hubs (with SEA being their primary global headquarters). They offer the highest frequency of flights on this route. As a member of the oneworld alliance, Alaska provides seamless connections for international travelers. They primarily use Boeing 737 aircraft, including the newer MAX 9 models, which feature larger overhead bins and power outlets at every seat.

United Airlines: The SFO Hub Powerhouse

As San Francisco is a premier hub for United Airlines, they provide numerous daily frequencies to Seattle. United, a founding member of the Star Alliance, serves this route with a mix of Airbus A319, A320, and Boeing 737 aircraft. Frequent flyers often choose United for the extensive lounge network at SFO and the ability to earn miles toward global travel.

Delta Air Lines: The SEA Hub Challenger

Delta Air Lines has significantly expanded its footprint in Seattle over the last decade. They offer several daily nonstop flights from SFO using modern aircraft like the Airbus A220, which is highly rated for passenger comfort with larger windows and wider seats. Delta is part of the SkyTeam alliance, making it a favorite for travelers connecting from international locations or other domestic hubs like Atlanta to Orlando (ATL-MCO).

Cabin classes and seat tips

Most aircraft on this route offer a three-class configuration: First Class, Premium Economy (branded as Comfort+ or Economy Plus), and Standard Economy. For a flight of just over two hours, many travelers find Economy sufficient, but if you are tall, the extra 3-4 inches of legroom in Premium Economy is a worthy upgrade. If you are flying on an Embraer 175, try to book a seat in the ‘A’ or ‘F’ columns to enjoy both a window and an aisle simultaneously.

Departure Airport Guide: SFO

San Francisco International Airport (SFO) is one of the most modern and efficient airports in the United States. It is located about 13 miles south of downtown San Francisco. Travelers should arrive at least 90 minutes before their SFO to SEA flight to clear security, especially during the morning rush.

Terminals and check-in

Alaska Airlines typically operates out of Harvey Milk Terminal 1, which is widely considered one of the best airport terminals in the world for its amenities and design. United Airlines occupies the majority of Terminal 3 and portions of the International Terminal G. Delta Air Lines usually operates from Terminal 2. Always check your boarding pass before heading to the airport as terminal assignments can change.

Getting to the airport

The most popular way to reach SFO is via BART (Bay Area Rapid Transit), which connects directly to the International Terminal. From there, the AirTrain automated people mover connects to all other terminals. If you are coming from the South Bay, Caltrain connects with BART at the Millbrae station for a smooth transfer.

Parking and rideshare pickup

Rideshare services like Uber and Lyft have a designated pickup and drop-off zone on the top level of the Domestic Garage. For those driving themselves, SFO offers Long-Term Parking with a dedicated shuttle, though it is recommended to book parking in advance online to secure a lower rate and a guaranteed spot.

Arrival Airport Guide: SEA

Seattle-Tacoma International Airport, commonly referred to as Sea-Tac, is located in the city of SeaTac, about 14 miles south of downtown Seattle. It is a bustling facility that has undergone significant renovations to handle the increased traffic of the Pacific Northwest.

Terminals and baggage claim

Sea-Tac consists of a Central Terminal with several concourses (A, B, C, D) and two satellite terminals (North and South) connected by an automated underground train system. Alaska Airlines usually uses the North Satellite (N Gates) and Concourse C. Delta often utilizes the South Satellite (S Gates) and Concourse A. Baggage claim is located on the lower level of the main terminal building.

Ground transportation into the city

The Link Light Rail is the most cost-effective way to get downtown. The station is connected to the fourth floor of the airport parking garage. Trains run every 8 to 15 minutes and will get you to Westlake Center in about 40 minutes. Taxis and rideshares are located on the third floor of the parking garage. During peak traffic hours (7-9 AM and 3-7 PM), allow at least an hour for a car trip to the city center.

Cheapest Time to Fly and Fare Trends

Fares for flights from San Francisco to Seattle fluctuate based on demand and seasonality. A live one-way Economy fare found today for 2026-10-29 is $68 on DL (nonstop, about 2h 21m), but prices change daily. Generally, booking at least 21 days in advance yields the best results. For the most current pricing, call 1-800-518-9067.

Best days and months to book

Tuesdays and Wednesdays are historically the cheapest days to fly this route. Business travelers dominate the Monday morning and Friday afternoon slots, driving up prices. January, February, and October are often the cheapest months to visit Seattle, as the weather is cooler and the summer tourist crowds have dissipated.

Typical fare ranges by season

How to lock in the lowest fare on Faresterminal

To secure cheap flights from San Francisco to Seattle, use our flexible date search tool. If your travel dates are set, set up a price alert. Since the SFO-SEA route is so competitive, airlines often launch flash sales. Booking your return leg as part of a round-trip can sometimes offer better protection against delays than two separate one-way tickets. Travelers also look at routes like Chicago to Miami (ORD-MIA) or Dallas to Las Vegas (DFW-LAS) when planning broader US tours.

Baggage Information and Fees

Baggage policies vary significantly by airline and fare class. Most ‘Basic Economy’ tickets on this route do not include a checked bag, and some may even restrict your carry-on to a small personal item that fits under the seat.

*Note: United Basic Economy does not allow a full-sized carry-on bag unless flying to certain destinations or holding status. Always verify your specific fare rules on this page or your confirmation email.

How to avoid baggage fees

The easiest way to avoid fees is to hold a co-branded airline credit card, which often grants the first checked bag for free for the cardholder and companions. Additionally, elite status in programs like MileagePlus or Mileage Plan usually includes generous baggage allowances. If you are flying Southwest from nearby Oakland (OAK) or San Jose (SJC), you get two checked bags for free, which may offset the cost of commuting to a different airport.

Weather in Seattle Through the Seasons

Seattle has a reputation for rain, but it is often a light mist rather than a heavy downpour. The city enjoys a Mediterranean-like climate with dry summers and cool, wet winters. Knowing what to pack is essential for a comfortable trip.

Best months to visit

July and August are undeniably the best months for weather, offering clear views of Mount Rainier. However, September is a local favorite, as the crowds thin out but the warm weather often lingers. If you are on a budget, May offers a great balance of moderate prices and decent weather for exploring the waterfront.

Where to Stay in Seattle

Downtown / Pike Place

Staying near Pike Place Market puts you in the heart of the action. You are within walking distance of the Great Wheel, the Seattle Art Museum, and the flagship Nordstrom store. It is the best area for first-time visitors who want to be near major landmarks and the Link Light Rail.

Capitol Hill

For a more local, vibrant feel, Capitol Hill is the city’s nightlife and arts hub. It is home to the Starbucks Reserve Roastery and Volunteer Park. The neighborhood is hilly but very walkable and filled with independent coffee shops, bookstores, and trendy restaurants.

South Lake Union

Often called the ‘Amazonia’ of Seattle, this neighborhood is sleek and modern. It is perfect for business travelers. It offers easy access to the Lake Union waterfront, where you can watch seaplanes take off, and it is just a short streetcar ride away from the Space Needle and MoPOP.

Events and Reasons to Visit Seattle

Seattle hosts numerous events that draw visitors from across the country. Bumbershoot, the city’s famous music and arts festival, takes place over Labor Day weekend. During the summer, Seafair brings hydroplane races and the Blue Angels to Lake Washington. Sports fans frequently fly in for Seahawks (NFL), Mariners (MLB), or Kraken (NHL) games. The city is also a gateway for Alaskan cruises, with many travelers spending two days in Seattle before embarking from Pier 66 or Pier 91. Other popular domestic routes include Newark to Fort Lauderdale (EWR-FLL) and Boston to Washington (BOS-DCA).

Travel Tips for San Francisco to Seattle Flyers

• Download the airline app before you leave for SFO to receive real-time gate change alerts.
• Use Clear or TSA PreCheck at SFO; Terminal 3 and Terminal 1 lines can be long during the Monday morning business rush.
• Sit on the right side of the plane (Seat K/F) when flying SFO to SEA for the best views of the Cascade Mountains and Mount Rainier on descent.
• Pack a reusable water bottle; both SFO and SEA have excellent ‘hydration stations’ to save you money on bottled water.
• Check the tech schedule; if there is a major convention at the Moscone Center or in Seattle, hotel prices will spike.
• Explore the SFO Museum; if you have extra time, SFO has rotating art and history exhibits throughout the terminals.
• Take the Light Rail in Seattle; it is often faster than a Lyft during rush hour and costs less than $4.
• Join loyalty programs; even if you fly this route once, the miles earned on Alaska or United can be used for future trips like Atlanta to Orlando (ATL-MCO).

Nearby and Related Routes

If you are looking for other ways to reach the Pacific Northwest or are planning a multi-city West Coast tour, consider these related routes. Many travelers who fly to Seattle also look at options from other major East Coast and Southern hubs to compare pricing and flight times. You can explore more options here:

• Atlanta to Seattle Flights (ATL-SEA)
• New York to Seattle Flights (JFK-SEA)
• Boston to Seattle Flights (BOS-SEA)
• Washington to Seattle Flights (IAD-SEA)
• Miami to Seattle Flights (MIA-SEA)
• Denver to Seattle Flights (DEN-SEA)