Frontier · SEA
What gates does Frontier use at Seattle Airport (SEA)?
Frontier uses 18 gates at Seattle Airport (SEA), mainly in Concourses S, D, N and A, with about 3-4 departures a day (Oct 1–21, 2026). It is the main airline at 1 of them. By departures: Concourses S (65% of its departures), D (27%), N (4%) and A (4%).
Based on 122 Frontier flights at SEA, Oct 1–21, 2026 (full days)
How Frontier compares at SEA
- 7th of the 34 airlines with regular flights at SEA by departures: 1% of them (3-4 departures a day of about 587 a day).
- 1% of the seats leaving SEA: about 690 a day, 212 per departure.
- 0.2 turns a day at each gate it turns planes at, 95% fewer than the airport’s 4.5.
- Median turn at the gate: 80 min, 6 min longer than the airport median (75 min).
- At SEA, Frontier’s 3-4 departures a day compare with Air Canada’s 4-5 and JetBlue’s 2. Frontier has 1 gate of its own; Air Canada 1; JetBlue shares its gates.
Where Frontier flies nonstop from SEA
4 nonstop destinations. Nonstop routes seen Oct 1–21, 2026; a few days of data can miss weekly or seasonal routes.
| Destination | Flights | Other airlines on this route |
|---|---|---|
| DenverDEN | 1/day | United (5-6/day), Alaska (4-5/day), Southwest (3-4/day), Delta (3/day), American (under 1/week) |
| Los AngelesLAX | 1/day | Alaska (9/day), Delta (6-7/day), United (3-4/day), American (3/day) |
| Las VegasLAS | 4-5/week | Alaska (8-9/day), Delta (4-5/day), Southwest (2-3/day), United (under 1/week), American (under 1/week) |
| Ontario, CAONT | 4-5/week | Alaska (3-4/day), Delta (2-3/day) |
When Frontier flies at SEA
- First departure of the day usually around 10:40 am, the last around 9:30 pm.
Frontier’s aircraft at SEA
| Aircraft | Departures | Seats each |
|---|---|---|
| A320neo | 1-2/day | 186 |
| A321neo | 1-2/day | 240 |
| A321 | 3-4/week | 230 |
| A320 | under 1/week | 180 |
About 690 seats leave SEA on Frontier each day. Of the gates it holds, 1 has taken a narrow-body. Seats are capacity from each airline’s seat map per aircraft type, not passengers.
Frontier’s gates at SEA
Concourse C C5L2
Held = the airline flying the gate most (regional partners count as their brand).
Gates it shares
| Gate | Who holds it | Other airlines there |
|---|---|---|
| S1 | Common use | Delta, Alaska, Air Canada, Volaris |
| S1B | Common use | WestJet, American, Air Canada, Southwest |
| S2 | Common use | Delta, American, Alaska, Volaris |
| S3 | Common use | Delta, Alaska, United, Volaris |
| S3A | Common use | American, Southwest, WestJet, JetBlue |
| S4 | Common use | Alaska, Delta, Icelandair, United |
| S4A | Common use | Southwest, JetBlue, American, WestJet |
| S5 | Common use | Delta, Air Canada, United, Aeroméxico |
| S5A | Too few flights yet | – |
| S9B | Too few flights yet | Southwest, American |
| S11 | Common use | Delta, Alaska, Lufthansa, STARLUX |
| S15 | Common use | Delta, Emirates, EVA Air, Icelandair |
| N16 | Held by Alaska | Alaska, Aer Lingus |
| D24 | Common use | Alaska, WestJet |
| D26 | Common use | American, Alaska, WestJet, Air Canada |
| C5L1 | Common use | WestJet |
| C5L3 | Common use | WestJet |
About this data
Based on 16 full days of flights at SEA, Oct 1–21, 2026. Gates of its own are the gates where Frontier flies the most (regional partners count as their brand). Every one of its departures has a seat count.
Frontier at SEA: questions
What terminal is Frontier at Seattle Airport (SEA)?
Frontier flies from Concourses S, D, N and A at Seattle Airport (SEA). By departures: Concourses S (65% of its departures), D (27%), N (4%) and A (4%).
What gates does Frontier use at SEA?
Frontier has 1 gate at SEA (the airline flying each one most): C5L2. It used 18 gates in all over Oct 1–21, 2026.
How many flights a day does Frontier have from SEA?
About 3-4 departures a day and 690 seats, averaged over Oct 1–21, 2026.
Where does Frontier fly nonstop from SEA?
Frontier flies nonstop to 4 cities from SEA, the most often to Los Angeles, Denver, Las Vegas and Ontario, CA. Routes seen Oct 1–21, 2026.
When is Frontier’s first flight out of SEA?
Usually around 10:40 am; the last leaves around 9:30 pm.
Does Frontier share gates at SEA?
Yes: 17 gates it uses are shared or used most by another airline, e.g. gate S1 with Delta, Alaska, Air Canada and Volaris.
Other airlines at SEA
All of SEA’s gates by airline · Frontier at every airport we map · Nonstop routes from SEA