Cheap flights from Baltimore to Seattle from $102

In general, February is the cheapest month to fly from Baltimore to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $298. If you don’t want to visit Seattle in February, then you should wait until January to fly from Baltimore, when ticket prices are also cheap, with an average price of $327.

On average, the least expensive day to fly to Seattle from Baltimore is on a Wednesday. momondo users have found tickets for Wednesday departures for as low as $459. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Sunday is the most expensive day to depart from Baltimore because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $591.

Flying to Seattle from Baltimore in the afternoon is the least expensive time of day to depart. momondo users have found prices as low as $487 when looking at flights departing in the afternoon. Flights to Seattle are more costly in the evening, with an average ticket price of $644. Departure times in the evening fall within the peak daily travel times, which is why tickets can be more expensive.

Fly from Baltimore/Washington to Seattle/Tacoma Intl for the best Baltimore/Washington - Seattle/Tacoma Intl flight prices

You are more likely to see cheaper flights to Seattle from Baltimore when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $407 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Baltimore for as low as $357 on momondo.

There are 4 cabin classes available to choose from on Baltimore to Seattle flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

You could potentially save up to 6% on your flight if you consider stops on a Baltimore to Seattle flight.

As of August 2026, prices for Baltimore to Seattle flights are approximately 15% more expensive when compared to flights at the same time last year.

Alaska Airlines, Southwest, and Delta are the most popular carriers operating from Baltimore/Washington to Seattle/Tacoma Intl

Alaska Airlines, United Airlines and Delta are the top three most popular airlines that fly to Seattle from Baltimore according to our data. Alaska Airlines is the first choice among our users, with 59% of people opting to fly with this airline when traveling to Seattle. Keep in mind that there are 8 different airlines that fly to Seattle on a routine basis, so you have a few additional options to choose from.

Minneapolis (MSP) was the most common stop: 75% of momondo users choosing 1-stop flights on this route connected there.

Flights via San Francisco (SFO) offer the lowest average round-trip price of $390.

Flights connecting via Minneapolis (MSP) have the shortest average one-way travel time: 8h 02m.

San Francisco (SFO) has the shortest average layover time for this route: 1h 27m.

The number of flights available between Baltimore and Seattle is 1 per day as of August 2026. The most frequent departure time is 6:00PM, with 46% of daily flights leaving at noon.

The number of flights available between Baltimore and Seattle is 11 per week as of August 2026. The most frequent departure day is Wed, with 27% of weekly flights leaving on this day.