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Flights from San Antonio to Seattle

Cheapest airlines flights from San Antonio to Seattle

You can choose from 1 airlines that fly from San Antonio to Seattle, including American Airlines, Alaska Airlines has lowest fares on this route.
American Airlines logo American Airlines
Airlines are determined based on actual purchased flight tickets from San Antonio to Seattle according to previous 12 months data from Trip.com.

Search for direct flights from San Antonio to Seattle in the next 3 months. Based on Trip.com's latest 7-day flight data, one-way direct flights start at US$140, and round-trip direct flights start at US$235.

      • Cheapest nonstop
        SAT 18:01
        4h 34m
        Nonstop
        SEA 20:35
        San Antonio - Seattle | Sat, May 9 | Alaska Airlines
        SEA 23:37
        4h 3m
        Nonstop
        SAT 05:40
        Seattle - San Antonio | Wed, May 13 | Alaska Airlines
        US$235 US$338
        30% off
        30% off
        US$338 US$235
      • SAT 17:50
        4h 36m
        Nonstop
        SEA 20:26
        San Antonio - Seattle | Wed, Apr 22 | Alaska Airlines
        SEA 10:51
        4h 14m
        Nonstop
        SAT 17:05
        Seattle - San Antonio | Wed, Apr 29 | Alaska Airlines
        US$307 US$338
        9% off
        9% off
        US$338 US$307
      • SAT 18:05
        7h 54m
        1 stop
        SEA 23:59
        San Antonio - Seattle | Thu, May 7 | Delta Air Lines
        SEA 05:30
        6h 45m
        1 stop
        SAT 14:15
        Seattle - San Antonio | Sun, May 10 | Delta Air Lines
        US$166 US$338
        51% off
        51% off
        US$338 US$166
      • SAT 16:47
        8h 8m
        1 stop
        SEA 22:55
        San Antonio - Seattle | Sat, May 9 | Delta Air Lines
        SEA 07:30
        8h 53m
        1 stop
        SAT 18:23
        Seattle - San Antonio | Wed, May 13 | Delta Air Lines
        US$175
        48% off
        US$338 US$175
      • SAT 18:12
        7h 42m
        1 stop
        SEA 23:54
        San Antonio - Seattle | Fri, Apr 17 | Delta Air Lines
        SEA 13:45
        7h 51m
        1 stop
        SAT 23:36
        Seattle - San Antonio | Sat, Apr 25 | Delta Air Lines
        US$175
        48% off
        US$338 US$175
      • SAT 18:10
        7h 33m
        1 stop
        SEA 23:43
        San Antonio - Seattle | Wed, Jun 3 | Delta Air Lines
        SEA 23:10
        9h 25m
        1 stop
        SAT 10:35
        Seattle - San Antonio | Tue, Jun 9 | Delta Air Lines
        US$189
        44% off
        US$338 US$189
      • SAT 07:30
        7h 5m
        1 stop
        SEA 12:35
        San Antonio - Seattle | Thu, May 14 | Delta Air Lines
        SEA 05:30
        8h 22m
        1 stop
        SAT 15:52
        Seattle - San Antonio | Wed, May 20 | Delta Air Lines
        US$190
        44% off
        US$338 US$190
      • SAT 07:38
        6h 59m
        1 stop
        SEA 12:37
        San Antonio - Seattle | Thu, Apr 23 | Delta Air Lines
        SEA 23:59
        9h 50m
        1 stop
        SAT 11:49
        Seattle - San Antonio | Tue, Apr 28 | Delta Air Lines
        US$193
        43% off
        US$338 US$193
      • SAT 17:59
        8h 13m
        1 stop
        SEA 00:12
        San Antonio - Seattle | Fri, May 15 | Delta Air Lines
        SEA 06:10
        9h 10m
        1 stop
        SAT 17:20
        Seattle - San Antonio | Wed, May 20 | Delta Air Lines
        US$203
        40% off
        US$338 US$203
      • SAT 07:30
        7h 5m
        1 stop
        SEA 12:35
        San Antonio - Seattle | Tue, May 19 | Delta Air Lines
        SEA 23:59
        9h 46m
        1 stop
        SAT 11:45
        Seattle - San Antonio | Wed, May 27 | Delta Air Lines
        US$203
        40% off
        US$338 US$203
      • SAT 07:35
        9h 16m
        1 stop
        SEA 14:51
        San Antonio - Seattle | Fri, May 1 | Delta Air Lines
        SEA 05:35
        6h 3m
        1 stop
        SAT 13:38
        Seattle - San Antonio | Wed, May 6 | Delta Air Lines
        US$204
        40% off
        US$338 US$204
      • SAT 18:05
        7h 54m
        1 stop
        SEA 23:59
        San Antonio - Seattle | Tue, Apr 21 | Delta Air Lines
        SEA 23:14
        9h 40m
        1 stop
        SAT 10:54
        Seattle - San Antonio | Sat, Apr 25 | Delta Air Lines
        US$208
        38% off
        US$338 US$208
      • SAT 13:00
        17h 25m
        1 stop
        SEA Invalid Date
        San Antonio - Seattle | Sat, Apr 18 | Normal Airline
        SEA 15:00
        6h
        Nonstop
        SAT 16:00
        Seattle - San Antonio | Mon, Apr 20 | Normal Airline
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      • Cheapest nonstop
        SAT 06:30
        4h 20m
        Nonstop
        SEA 08:50
        San Antonio - Seattle | Tue, May 19 | Alaska Airlines
        US$140 US$166
        16% off
        16% off
        US$166 US$140
      • SAT 18:01
        4h 34m
        Nonstop
        SEA 20:35
        San Antonio - Seattle | Wed, May 6 | Alaska Airlines
        US$151 US$166
        9% off
        9% off
        US$166 US$151
      • SAT 19:54
        16h 12m
        1 stop
        SEA 10:06
        San Antonio - Seattle | Tue, Jun 2 | Frontier Airlines
        US$103 US$166
        38% off
        38% off
        US$166 US$103
      • SAT 18:14
        8h 37m
        1 stop
        SEA 00:51
        San Antonio - Seattle | Wed, May 6 | American Airlines
        US$103
        38% off
        US$166 US$103
      • SAT 17:59
        8h 13m
        1 stop
        SEA 00:12
        San Antonio - Seattle | Sat, May 23 | Delta Air Lines
        US$104
        37% off
        US$166 US$104
      • SAT 17:55
        8h 15m
        1 stop
        SEA 00:10
        San Antonio - Seattle | Wed, Jun 3 | Delta Air Lines
        US$112
        33% off
        US$166 US$112
      • SAT 07:35
        9h 16m
        1 stop
        SEA 14:51
        San Antonio - Seattle | Wed, May 6 | Delta Air Lines
        US$118
        28% off
        US$166 US$118
      • SAT 07:30
        9h 35m
        1 stop
        SEA 15:05
        San Antonio - Seattle | Fri, May 29 | Delta Air Lines
        US$121
        27% off
        US$166 US$121
      • SAT 19:54
        14h 15m
        1 stop
        SEA 08:09
        San Antonio - Seattle | Mon, May 11 | Frontier Airlines
        US$121
        27% off
        US$166 US$121
      • SAT 19:54
        15h 55m
        1 stop
        SEA 09:49
        San Antonio - Seattle | Tue, May 12 | Frontier Airlines
        US$121
        27% off
        US$166 US$121
      • SAT 17:35
        9h 24m
        1 stop
        SEA 00:59
        San Antonio - Seattle | Wed, Jun 3 | American Airlines
        US$121
        27% off
        US$166 US$121
      • SAT 13:00
        17h 25m
        1 stop
        SEA Invalid Date
        San Antonio - Seattle | Sat, Apr 18 | Normal Airline
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Displayed flight fares from San Antonio to Seattle are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

San Antonio to Seattle Flight Details

The distance between San Antonio and Seattle is about 2,853.97 km. The average flying time from San Antonio to Seattle is around 5 hours 9 minutes. Based on Trip.com's latest data, travel demand is highest in July. The off-season for travel is November.

Cheapest one-way flight priceUS$103
Cheapest return ticket priceUS$166
Cheapest monthNovember
Peak season for travelJuly
Flight distance2,853.97 km
Average flight time5 hours 9 minutes
Popular airlineAmerican Airlines
Flight statistics for the San Antonio–Seattle route are based on aggregated booking data from Trip.com over the past 12 months.

Trip.com Price Insights on Flights from San Antonio to Seattle

Which month has the cheapest one-way flights from San Antonio to Seattle?

The average price of one-way flights from San Antonio to Seattle purchased by Trip.com users by month over the past 12 months.

Based on Trip.com’s data, the cheapest month for flights from San Antonio to Seattle is April, with an average price of US$87; while the month with the highest flight price is usually March, with an average price of up to US$309.

US$309
US$198
US$87
0
  • US$87
    Apr
  • US$254
    May
  • US$197
    Jun
  • US$308
    Jul
  • US$136
    Aug
  • US$169
    Sep
  • US$267
    Oct
  • US$149
    Nov
  • US$307
    Dec
  • US$215
    Jan
  • US$175
    Feb
  • US$309
    Mar

What is the cheapest day of the week to fly from San Antonio to Seattle?

Average weekly flight prices from San Antonio to Seattle by travel date (Based on Trip.com’s past 12 months of data)

Based on Trip.com’s past 12 months of flight data, the cheapest day to fly from San Antonio to Seattle is Saturday, with average prices lower than on other days. Avoid Thursday, as prices are usually highest then.

US$258
US$207
US$155
US$104
    Cheapest
  • US$197
    Mon
  • US$164
    Tue
  • US$179
    Wed
  • US$258
    Thu
  • US$248
    Fri
  • US$155
    Sat
  • US$231
    Sun

When is the cheapest day to fly from San Antonio to Seattle during International Workers' Day?

Based on Trip.com's data over the past 3 days, these are the lowest one-way flight prices from San Antonio to Seattle during International Workers' Day.

International Workers' Day is scheduled for May 1. The cheapest flights from San Antonio to Seattle are available on Apr 28, with fares starting at US$109.

US$166
US$138
US$109
US$81
  • US$109
    28
    Apr
  • US$139
    29
  • US$109
    30
  • US$123
    1
    May
  • US$166
    2
  • US$135
    3

Frequently Asked Questions

  • What are the cheapest flights from San Antonio to Seattle (SAT-SEA)?

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as US$103 on Cheapest nonstop routes (e.g. SAT to SEA on Tue, Jun 2), while Delta Air Lines offers Cheapest nonstop round-trips from US$166 departing on Thu, May 7 and returning on Sun, May 10.
  • At the moment, you can catch a nonstop flight from San Antonio to Seattle with the following airlines, including: Alaska Airlines Selected airlines are based on historical data collected from flight bookings users made on Trip.com within the last 90 days.
  • It takes about 5 hours 9 minutes to fly from San Antonio to Seattle.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from San Antonio to Seattle is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • Based on Trip.com data in the past 4 weeks, there is 6 flight per week flying from San Antonio to Seattle. You can check the weekly schedule for popular airlines on this route below: Alaska Airlines: S/M/T/W/T/F/S -- AS519 (06:32)
  • To find best deals on flights from San Antonio to Seattle, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Tue, Jun 2, with one-way flights priced at just US$103.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Alaska Airlines.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Seattle travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from San Antonio to Seattle is November, when demand for travel is lower.
  • After crunching the numbers on our April flight calendar, it's currently cheapest to fly from San Antonio to Seattle on April 16, 2026 with Frontier Airlines, with prices starting at US$105.
  • You can land at any one of the following hubs in Seattle, with San Antonio International Airport to Seattle-Tacoma International Airport (SAT-SEA) is by far the most common option on this route: King County (Boeing Field) International Airport (BFI) Kenmore Air Harbor Seaplane Base (LKE) Seattle-Tacoma International Airport (SEA).
  • The time difference between Seattle and San Antonio is 2h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.

Trip.com Airline Insights on Flights from San Antonio to Seattle

Which airline offers the cheapest direct flights from San Antonio to Seattle?

Data is based on the average price of all nonstop flights from San Antonio to Seattle on Trip.com over the past 12 months.

Based on Trip.com’s data from the past 12 months, Frontier Airlines provides the lowest-priced direct flights from San Antonio to Seattle, with fares starting at US$149.

US$101
US$149
US$198
US$247
US$295
Frontier Airlines
US$149
Frontier Airlines
Delta Air Lines
US$203
Delta Air Lines
American Airlines
US$203
American Airlines
Alaska Airlines
US$260
Alaska Airlines
Hawaiian Airlines
US$295
Hawaiian Airlines

Which airline operates the most flights from San Antonio to Seattle?

Total flights from San Antonio to Seattle across all airlines. (Based on Trip.com data from the past month)

Based on Trip.com’s data from the past month, Hawaiian Airlines/Alaska Airlines operates the most frequent flights from San Antonio to Seattle, with 8 flights per week.

1
3
6
8
Hawaiian Airlines
8
Hawaiian Airlines
Alaska Airlines
8
Alaska Airlines
Air Tahiti Nui
7
Air Tahiti Nui
United Airlines
3
United Airlines

How many flights fly from San Antonio to Seattle daily?

The data is based on the flight numbers for each day of the week from San Antonio to Seattle within the Trip.com database over the past month.

Based on the past month's historical data from Trip.com, the number of flights from San Antonio to Seattle is the highest on Saturday/Sunday and the lowest on Monday/Tuesday.

16
15
13
12
Highest
13
Mon
13
Tue
14
Wed
14
Thu
15
Fri
16
Sat
16
Sun

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Note: Prices shown on this page are the estimated lowest prices found in the last 24 hours and include all taxes and fees.

Book with no extra fees

Prices displayed on this page are all-inclusive (incl. taxes, fuel surcharges, Civil Aviation Development Fund, etc.), and all fees are clearly shown before you pay. Charges for checked baggage, onboard meals, Wi‑Fi, and other optional services are also included where applicable in the flight cards.

Real-time pricing updates

Prices, availability, and travel details on this page have been updated within the last 24 hours, and for many routes are refreshed in real time. The more popular the route, the more accurate and up-to-date the data.

Change & Cancellation Policy

Trip.com shows the change and cancellation rules for each ticket during the booking process, including all related fees and conditions. Please refer to the following scenarios:
Voluntary cancellation/change:
To request a change or cancellation, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and flight segment, and submit your request. Please note that additional charges may apply based on the airline’s fare rules.
Cancellation/change due to a flight schedule change:
If your flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For full details of change and cancellation policies, please refer to the customer support pages.