Buffalo (BUF) to Seattle (SEA) at a glance

Travel to Seattle (SEA) from Buffalo (BUF) with a range of airlines on this domestic long-haul route. You can compare options from both full-service and low-cost carriers to find the ideal itinerary that aligns with your budget and schedule. As you prepare for your adventure, which includes exploring Seattle's iconic sights and neighborhoods, gather essential details about flights from Buffalo Niagara International Airport to Seattle-Tacoma International Airport for a smooth travel experience.

• Fastest flight duration: around 6h 45m in-flight, plus roughly 1h 15m layover with one stop
• Route distance: roughly 2,100 miles (3,380 km)
• Flights per week: around 15+ flights with multiple daily departures on average
• Typical fares (one-way): economy tickets often range from $145–$510, depending on seasonality and how far ahead you book

Flights from Buffalo Niagara International Airport (BUF) to Seattle - Tacoma International Airport (SEA)

According to recent traveler bookings, here are the top airlines favored for flights from Buffalo to Seattle, particularly for one-stop and multi-stop journeys. Common layovers include O'Hare International Airport (ORD) with an approximate 1 hour and 15-minute layover, Detroit Metropolitan Wayne County Airport (DTW) also around 1 hour and 15 minutes, and Denver International Airport (DEN), similarly about 1 hour and 15 minutes. This variety allows you to explore different combinations of price, total travel time, and cabin class to find the ideal itinerary.

• American Airlines: This full-service airline provides one-stop flights, with one-way ticket prices generally falling between $145 and $520. It represents about 29% of the departures on this route, featuring an in-flight duration of 6 hours and 45 minutes, and an overall travel time of approximately 8 hours when including a layover.
• Delta: Another full-service option, Delta operates one-stop routes, with fares typically ranging from $155 to $535. It accounts for around 26% of the flights on this route, with a flight time of 6 hours and 45 minutes and a total journey duration of about 8 hours, including layover time.
• United: As a full-service airline, United offers one-stop service with one-way prices usually between $160 and $535. It holds a share of approximately 22% of the departures on this route, boasting an in-flight time of 6 hours and 45 minutes, and a total travel duration of about 8 hours, including layovers.
• Southwest Airlines: A budget-friendly carrier, Southwest provides both one-stop and multi-stop services, with one-way fares typically ranging from $170 to $465. It makes up about 13% of the departures, featuring an in-flight time of 6 hours and 45 minutes and a total travel time of around 8 hours.
• Frontier Airlines: This low-cost airline offers one-stop service, with one-way fares generally between $145 and $285. It represents approximately 3% of departures on this route, with an in-flight time of 6 hours and 45 minutes and a total journey time of roughly 8 hours, including layover periods.

Travelers can enhance their journey from Buffalo to Seattle by upgrading their flights. Leading airlines for first class include American Airlines, United, and Delta, offering exceptional service and comfort.

Best time to fly from Buffalo (BUF) to Seattle (SEA)

The most popular months for travelers flying from Buffalo to Seattle are June, July, and August, when peak temperatures in Seattle reach up to 67.5°F in August. If you prefer quieter travel, consider November, the least busy and relatively cheaper time to visit with fewer crowds and temperatures around 44.2°F. For better deals, June usually offers the lowest average one-way fare around $246. Flight availability peaks in July, with approximately 33 flights per week, making it easier to find convenient departure times. January and March have the fewest flights, with approximately 12 flights per week.

• Cheapest time to fly: June usually offers good deals with average one-way fare around $246, roughly 15% cheaper than the yearly average.
• More budget-friendly months to fly: September, October, and May typically offer average one-way fares of around $253.
• Most flight options: July has the highest number of flights from Buffalo to Seattle, with approximately 33 flights per week, giving you more flexibility in scheduling your trip.

Month	Temperature	Demand	Weekly Flights	Average one-way Fare
January	40.3°F (4.6°C)	Low	12	$338
February	40.5°F (4.7°C)	Average	13	$307
March	43.9°F (6.6°C)	Average	12	$315
April	48.6°F (9.2°C)	Average	14	$340
May	55.8°F (13.2°C)	Average	22	$257
June	61.0°F (16.1°C)	High	25	$246
July	67.1°F (19.5°C)	High	33	$278
August	67.5°F (19.7°C)	High	32	$269
September	61.3°F (16.3°C)	Average	19	$249
October	52.7°F (11.5°C)	Average	21	$254
November	44.2°F (6.8°C)	Low	15	$297
December	39.2°F (4.0°C)	Low	19	$337

*Average one-way fare is based on Expedia flight booking data from January 2025 to April 2026 for the specified route and travel class and may change depending on availability, dates, and demand.

Alternative route from Buffalo (BUF) to Seattle (SEA)

• Rochester to Seattle (ROC-SEA): Greater Rochester International Airport (ROC) is located approximately 56 miles from Buffalo Niagara International Airport (BUF). One-way economy tickets on this route generally fall between $120 and $460, influenced by the time of year and how far in advance you book. This route features both one-stop and multi-stop flights, with common layover points at O'Hare International Airport (ORD) and Detroit Metropolitan Wayne County Airport (DTW). Leading airlines servicing this route include United and American Airlines. Additionally, first-class service is offered for travelers looking for a more premium experience.

How to find the best prices for flights from Buffalo (BUF) to Seattle (SEA)

Getting some of the best deals on flights from Buffalo to Seattle is all about timing and flexibility. Here are some key tips to help you save:

1. Best times to book and fly: cheaper fares are usually available when booking at least two months in advance, although most travelers typically book 2-8 weeks ahead. Afternoon flights (12 PM-6 PM) often have lower prices, while morning flights (5 AM-12 PM) are more popular. Traveling on Tuesday generally yields cheaper rates, but Saturday remains the busiest travel day.
2. Set up price alerts: stay updated on price changes by using Expedia's Price Tracker. Receive alerts when fares drop for your selected route.
3. Bundle and save: bundle your flight and hotel to save on Expedia, or unlock a hotel deal after booking your flight.*
4. Compare flight options: use Expedia's search tool to compare airlines, routes, direct vs. non-direct flights, and flight times. You can also sort by price to find the most affordable options.
5. Stay flexible with dates: being open to different travel days can sometimes help you find better prices on flights and hotels.
6. Think about luggage: nowadays, it's important to check the airline's baggage policies to find the best value. That may be paying for an additional carry-on bag or booking a ticket with checked luggage included. Either way, double-check your allowance before confirming your booking to avoid excess baggage fees at the airport.

*Members only. Savings vary and are not available on all bundles. Select hotels.

Arriving at Seattle - Tacoma International Airport from Buffalo Niagara International Airport

Seattle welcomes travelers from Buffalo with a range of transport options based on price, convenience, and proximity. Seattle city center is approximately a 20-minute drive (covering about 14 miles) from Seattle - Tacoma International Airport, depending on traffic. Here's how to reach Seattle efficiently:

• Hotel transfer: Transfers offer a convenient way to reach your hotel in Seattle, with private rides that can be arranged in advance.
• Car rental: Renting a car from Seattle - Tacoma International Airport is a great option if you plan to explore and sightsee beyond the city. Browse cheap car rentals at Seattle - Tacoma International Airport on Expedia.
• Taxi/ride-hailing: Taxis and ride-hailing services may be available from designated pickup areas outside the terminal, check locally on arrival.
• Public transportation: From Seattle - Tacoma International Airport, SeaTac/Airport Station, a metro station, is located about 0.3 miles away on foot, while Tukwila Station, a train station, is situated about 4.3 miles from the airport and is most conveniently reached by car.