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Flights from Seattle to San Antonio

Hi, I've summed up all the key info for Seattle to San Antonio flights

Cheapest one-way

$ 95
Frontier Airlines Thu, Oct 8

55% below next 30d avg. ($209)

Cheapest round-trip

$ 228
Frontier Airlines Fri, Oct 16

55% below next 30d avg. ($509)

Fastest flight

6h 40mAvg: 4h 48m

Recommended airlines

When to travel

SeptemberCheapest month
JulyPeak month

With a lowest one-way fare of $95 , travelers can expect an average price of $209 for upcoming trips, while round-trip tickets start at $228 . Flights typically take around 4h 48m , but the fastest nonstop option completes the journey in just 6h 40m minutes. There are 4 flights weekly on this route. You can arrive at any of the following airports in San Antonio: San Antonio International Airport (SAT) , and Kelly Field Annex/Lackland Air Force Base (SKF) . Flights from Seattle-Tacoma International Airport to San Antonio International Airport (SEA-SAT) are by far the most popular option for this route. To secure the best rates, booking 40 days in advance is recommended, and the cheapest travel days are Tuesday, Wednesday, and Saturday .

Updated 4h ago · This content is an AI-powered summary based on Trip.com data. Prices and availability are subject to change. Please refer to actual prices, availability, and travel conditions.

Explore the cheapest one-way and round-trip flights from Seattle to San Antonio over the next 90 days, with one-way fares from $95 and round-trip from $228. Based on Trip.com's latest 7-day flight data.

      • Cheapest nonstop
        SEA 10:00 AM
        4h 19m
        Nonstop
        SAT 4:19 PM
        Seattle - San Antonio | Wed, Sep 16 | Alaska Airlines
        SAT 5:29 PM
        4h 24m
        Nonstop
        SEA 7:53 PM
        San Antonio - Seattle | Tue, Sep 22 | Alaska Airlines
        $393 $432
        9% off
        9% off
        $432 $393
      • SEA 9:16 PM
        14h 36m
        1 stop
        SAT 1:52 PM
        Seattle - San Antonio | Fri, Oct 16 | Frontier Airlines
        SAT 8:21 PM
        20h 51m
        1 stop
        SEA 3:12 PM
        San Antonio - Seattle | Mon, Oct 19 | Frontier Airlines
        $228 $432
        47% off
        47% off
        $432 $228
      • SEA 9:45 PM
        21h 18m
        1 stop
        SAT 9:03 PM
        Seattle - San Antonio | Thu, Sep 17 | Frontier Airlines
        SAT 3:19 PM
        20h 23m
        1 stop
        SEA 9:42 AM
        San Antonio - Seattle | Wed, Sep 23 | Frontier Airlines
        $229 $432
        47% off
        47% off
        $432 $229
      • SEA 9:16 PM
        12h 59m
        1 stop
        SAT 12:15 PM
        Seattle - San Antonio | Thu, Oct 15 | Frontier Airlines
        SAT 8:21 PM
        20h 51m
        1 stop
        SEA 3:12 PM
        San Antonio - Seattle | Mon, Oct 19 | Frontier Airlines
        $244
        44% off
        $432 $244
      • SEA 10:57 AM
        25h 23m
        1 stop
        SAT 2:20 PM
        Seattle - San Antonio | Tue, Sep 29 | Frontier Airlines
        SAT 12:39 PM
        23h 3m
        1 stop
        SEA 9:42 AM
        San Antonio - Seattle | Mon, Oct 5 | Frontier Airlines
        $246
        43% off
        $432 $246
      • SEA 2:30 PM
        7h 43m
        1 stop
        SAT 12:13 AM
        Seattle - San Antonio | Thu, Sep 17 | Delta Air Lines
        SAT 3:19 PM
        20h 23m
        1 stop
        SEA 9:42 AM
        San Antonio - Seattle | Wed, Sep 23 | Frontier Airlines
        $246
        43% off
        $432 $246
      • SEA 3:45 PM
        6h 14m
        1 stop
        SAT 11:59 PM
        Seattle - San Antonio | Fri, Oct 16 | American Airlines
        SAT 8:21 PM
        20h 51m
        1 stop
        SEA 3:12 PM
        San Antonio - Seattle | Mon, Oct 19 | Frontier Airlines
        $246
        43% off
        $432 $246
      • SEA 4:27 PM
        24h 59m
        1 stop
        SAT 7:26 PM
        Seattle - San Antonio | Tue, Oct 20 | Frontier Airlines
        SAT 8:20 PM
        20h 52m
        1 stop
        SEA 3:12 PM
        San Antonio - Seattle | Tue, Oct 27 | Frontier Airlines
        $249
        42% off
        $432 $249
      • SEA 4:27 PM
        24h 58m
        1 stop
        SAT 7:25 PM
        Seattle - San Antonio | Wed, Nov 11 | Frontier Airlines
        SAT 12:45 PM
        7h 58m
        1 stop
        SEA 6:43 PM
        San Antonio - Seattle | Mon, Nov 16 | Delta Air Lines
        $250
        42% off
        $432 $250
      • SEA 2:30 PM
        7h 43m
        1 stop
        SAT 12:13 AM
        Seattle - San Antonio | Thu, Oct 15 | Delta Air Lines
        SAT 8:21 PM
        20h 51m
        1 stop
        SEA 3:12 PM
        San Antonio - Seattle | Mon, Oct 19 | Frontier Airlines
        $251
        42% off
        $432 $251
      • SEA 5:45 AM
        5h 55m
        1 stop
        SAT 1:40 PM
        Seattle - San Antonio | Wed, Sep 16 | Delta Air Lines
        SAT 12:29 PM
        8h 7m
        1 stop
        SEA 6:36 PM
        San Antonio - Seattle | Tue, Sep 22 | Delta Air Lines
        $253
        41% off
        $432 $253
      • SEA 1:00 PM
        17h 25m
        1 stop
        SAT 2:00 PM
        Seattle - San Antonio | Thu, Sep 17 | Normal Airline
        SAT 3:00 PM
        6h
        Nonstop
        SEA 4:00 PM
        San Antonio - Seattle | Sat, Sep 19 | Normal Airline
        Find more flights
        Find more flights
      • Cheapest nonstop
        SEA 1:19 PM
        6h 40m
        Nonstop
        SAT 9:59 PM
        Seattle - San Antonio | Wed, Oct 7 | United Airlines
        $176 $200
        12% off
        12% off
        $200 $176
      • SEA 1:19 PM
        6h 40m
        Nonstop
        SAT 9:59 PM
        Seattle - San Antonio | Wed, Oct 21 | United Airlines
        $182 $200
        9% off
        9% off
        $200 $182
      • SEA 9:45 PM
        22h 4m
        1 stop
        SAT 9:49 PM
        Seattle - San Antonio | Thu, Oct 8 | Frontier Airlines
        $95 $200
        53% off
        53% off
        $200 $95
      • SEA 4:27 PM
        24h 58m
        1 stop
        SAT 7:25 PM
        Seattle - San Antonio | Sat, Oct 31 | Frontier Airlines
        $108
        46% off
        $200 $108
      • SEA 4:27 PM
        24h 58m
        1 stop
        SAT 7:25 PM
        Seattle - San Antonio | Tue, Nov 10 | Frontier Airlines
        $113
        44% off
        $200 $113
      • SEA 4:27 PM
        24h 58m
        1 stop
        SAT 7:25 PM
        Seattle - San Antonio | Tue, Nov 3 | Frontier Airlines
        $113
        44% off
        $200 $113
      • SEA 4:27 PM
        24h 58m
        1 stop
        SAT 7:25 PM
        Seattle - San Antonio | Tue, Oct 27 | Frontier Airlines
        $113
        44% off
        $200 $113
      • SEA 12:14 PM
        7h 20m
        1 stop
        SAT 9:34 PM
        Seattle - San Antonio | Thu, Nov 5 | Frontier Airlines
        $117
        42% off
        $200 $117
      • SEA 4:27 PM
        24h 59m
        1 stop
        SAT 7:26 PM
        Seattle - San Antonio | Sat, Oct 24 | Frontier Airlines
        $118
        41% off
        $200 $118
      • SEA 4:27 PM
        25h 58m
        1 stop
        SAT 7:25 PM
        Seattle - San Antonio | Sun, Nov 1 | Frontier Airlines
        $120
        40% off
        $200 $120
      • SEA 9:13 PM
        22h 21m
        1 stop
        SAT 9:34 PM
        Seattle - San Antonio | Fri, Nov 6 | Frontier Airlines
        $122
        39% off
        $200 $122
      • SEA 9:45 PM
        14h 3m
        1 stop
        SAT 1:48 PM
        Seattle - San Antonio | Sat, Oct 3 | Frontier Airlines
        $123
        39% off
        $200 $123
      • SEA 1:00 PM
        17h 25m
        1 stop
        SAT 2:00 PM
        Seattle - San Antonio | Thu, Sep 17 | Normal Airline
        Find more flights
        Find more flights

Flight.News
A Heat Advisory is in effect for San Antonio, the I-35 corridor, and the Coastal Plains from noon to 7 PM CDT Monday. Heat index values up to 111 are expected. Hot temperatures and high humidity may cause heat illnesses.
Flights from Seattle to San Antonio operate an average of 4 times per day over the past 7 days, with a 9.1% on-time departure rate and a 63.6% on-time arrival rate.

Which airlines are the most popular for Seattle to San Antonio flights?

The most popular airlines flying from Seattle to San Antonio are United Airlines, American Airlines, and Delta Air Lines, among 4 carriers on this route. Frontier Airlines offers the lowest fares. Based on Trip.com's flight booking data from the previous 12 months.
United Airlines logo United Airlines
American Airlines logo American Airlines
Delta Air Lines logo Delta Air Lines
Alaska Airlines logo Alaska Airlines
Airlines are determined based on actual purchased flight tickets from Seattle to San Antonio according to previous 12 months data from Trip.com.

Trip.com price insights on flights from Seattle to San Antonio

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

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

Based on Trip.com’s data, the cheapest month for flights from Seattle to San Antonio is November, with an average price of $145; while the month with the highest flight price is usually October, with an average price of up to $375.

$375
$260
$145
$30
    Cheapest
  • $146
    Sep
  • $375
    Oct
  • $145
    Nov
  • $291
    Dec
  • $299
    Jan
  • $199
    Feb
  • $189
    Mar
  • $187
    Apr
  • $343
    May
  • $198
    Jun
  • $244
    Jul
  • $283
    Aug

When is the cheapest day to fly from Seattle to San Antonio during Columbus Day?

Data is based on the lowest one-way price from Seattle to San Antonio during Columbus Day on Trip.com in the past 3 days.

Columbus Day is scheduled for Oct 12. The cheapest flights from Seattle to San Antonio are available on Oct 9, with fares starting at $100.

$352
$226
$100
0
  • $100
    9
    Oct
  • $169
    10
  • $352
    11
  • $352
    12
  • $139
    13
  • $139
    14

Frequently Asked Questions

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

    Based on Trip.com data, Frontier Airlines offers one-way fares as low as $95 on Cheapest nonstop routes (e.g. SEA to SAT on Thu, Oct 8), while Frontier Airlines offers Cheapest nonstop round-trips from $228 departing on Fri, Oct 16 and returning on Mon, Oct 19.
  • At the moment, you can catch a nonstop flight from Seattle to San Antonio 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 around 4 hours 48 minutes to fly from Seattle (SEA) to San Antonio (SAT).
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Seattle to San Antonio 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 4 flight per week flying from Seattle to San Antonio. You can check the weekly schedule for popular airlines on this route below: United Airlines: S/M/-/W/T/-/S -- UA2281 (13:43) Alaska Airlines: S/M/T/W/T/F/S -- AS494 (10:29)
  • To find best deals on flights from Seattle to San Antonio, 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 Thu, Oct 8, with one-way flights priced at just $95.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is United 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 San Antonio travel is around July.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Seattle to San Antonio is September, when demand for travel is lower.
  • You can arrive at any of the following airports in San Antonio: San Antonio International Airport (SAT), and Kelly Field Annex/Lackland Air Force Base (SKF). Flights from Seattle-Tacoma International Airport to San Antonio International Airport (SEA-SAT) are by far the most popular option for this route.
  • The time difference between San Antonio and Seattle 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.
  • Based on Trip.com data for flights departing in the next 30 days, the average one-way fare from Seattle to San Antonio is $209. Fares vary by travel date, airline and availability.
  • Based on Trip.com data for travel in the next 30 days, the average round-trip fare from Seattle to San Antonio is $509. The final price depends on the outbound and return dates, airline and fare conditions.
  • Enter Seattle and San Antonio, choose your travel dates and passengers, then compare flights by price, duration and baggage. Select a fare, review the change and cancellation rules, enter traveler details and complete payment to receive your confirmation.

Explore More Popular Flights

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

Book with no extra fees

Prices displayed in this page are all-inclusive prices (incl. taxes, fuel surcharge, civil aviation development fund, etc) with all fees confirmed before payment. Fees for luggage, meals, WLAN, or other additional services are also included as shown in the flight cards.

Real-time pricing updates

Prices, availability, and travel information on this page were updated within last 24 hours—even in real-time. The more popular the route, the more precise the data.

Change & Cancellation Policy

Trip.com displays flight cancellation and change policies for each flight ticket during the booking process, including fees and applicable conditions. Please check the following scenarios:
Voluntary cancellation/change:
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.
Cancellation/change due to a flight schedule change:
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.