Go through your results for flights to Seattle in the USA with Netflights. The most popular airlines for this route are Delta Air Lines, Air Canada & United Airlines, with Delta Air Lines claiming the top spot. Although American Airlines usually has the best prices, it's best to double check what's available for your travel dates.
If these flights are too expensive, try searching for a different time of year. So if your dates are flexible, consider looking at different times of year.
53 direct and indirect flights go to Seattle every week and we scan them all. Look out for flights with American Airlines, as they often have good deals. Or broaden your search by looking at other airports in the USA.
For even more options, check what other airports you could fly to Seattle from. You might be able to make a saving by going from a different airport or city.