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Route overview: Kansas City to Seattle (SEA) flight deals

Kansas City → Seattle

Dec 13, 2026 · return Dec 16, 2026

MCI → SEA1 adulteconomyRound trip

8 flight options · 4 airlines

Nonstop flights

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
2:46 pmMCI
4h 12m
Nonstop
4:58 pmSEA
Alaska Airlines
9:55 amSEA
3h 28m
Nonstop
3:23 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Wed, Dec 16

Alaska Airlines
6:00 amMCI
4h 20m
Nonstop
8:20 amSEA
Alaska Airlines
9:55 amSEA
3h 28m
Nonstop
3:23 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Sun, Dec 13 – Wed, Dec 16

Southwest Airlines
5:20 amMCI
7h 15m
DAL · 1h 10m
10:35 amSEA
Southwest Airlines
9:25 amSEA
5h 10m
DEN · 1h
4:35 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Wed, Dec 16

United Airlines
7:00 amMCI
7h 18m
SFO · 1h
12:18 pmSEA
United Airlines
5:05 amSEA
5h 23m
DEN · 1h 3m
12:28 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Wed, Dec 16

Delta Air Lines
7:00 amMCI
4h 21m
Nonstop
9:21 amSEA
Delta Air Lines
9:18 amSEA
5h 51m
SLC · 1h 16m
5:09 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Wed, Dec 16

Southwest Airlines
1:30 pmMCI
7h 10m
SMF · 1h 25m
6:40 pmSEA
Southwest Airlines
9:25 amSEA
5h 10m
DEN · 1h
4:35 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Wed, Dec 16

United Airlines
9:48 amMCI
7h 44m
ORD · 1h 11m
3:32 pmSEA
United Airlines
5:05 amSEA
5h 23m
DEN · 1h 3m
12:28 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 13 – Wed, Dec 16

United Airlines
5:19 pmMCI
7h 57m
DEN · 2h 50m
11:16 pmSEA
United Airlines
5:05 amSEA
5h 23m
DEN · 1h 3m
12:28 pmMCI

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

MCI ⇄ SEA

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

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Explore this route

All dates for this routeDec 12, 2026 · Return optionsDec 14, 2026 · Return optionsHotels in Seattle with Axel
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-13 → 2026-12-16Alaska AirlinesAS418 / AS418Axel-exclusive $355.002026-10-29T01:28:15Z
2026-12-13 → 2026-12-16Southwest AirlinesWN1349 + WN534 / WN2150 + WN2075Axel-exclusive $330.002026-10-29T01:28:15Z
2026-12-13 → 2026-12-16United AirlinesUA2051 + UA2192 / UA757 + UA2159Axel-exclusive $350.002026-10-29T01:28:15Z
2026-12-13 → 2026-12-16Delta Air LinesDL2105 / DL1016 + DL2903Axel-exclusive $355.002026-10-29T01:28:15Z
2026-12-13 → 2026-12-16Alaska AirlinesAS563 / AS418Axel-exclusive $355.002026-10-29T01:28:15Z
2026-12-13 → 2026-12-16Southwest AirlinesWN2769 + WN1586 / WN2150 + WN2075Axel-exclusive $330.002026-10-29T01:28:15Z
2026-12-13 → 2026-12-16United AirlinesUA5270 + UA1660 / UA757 + UA2159Axel-exclusive $350.002026-10-29T01:28:15Z
2026-12-13 → 2026-12-16United AirlinesUA2123 + UA2651 / UA757 + UA2159Axel-exclusive $350.002026-10-29T01:28:15Z

Route overview: Kansas City to Seattle (SEA) flight deals

2026-12-13 → 2026-12-16 · Axel-exclusive $355.00

  • Alaska Airlines AS418: MCI 2026-12-13 14:46:00 → SEA 2026-12-13 16:58:00; nonstop; 252 minutes. Local airport times.
  • Alaska Airlines AS418: SEA 2026-12-16 09:55:00 → MCI 2026-12-16 15:23:00; nonstop; 208 minutes. Local airport times.

2026-12-13 → 2026-12-16 · Axel-exclusive $330.00

  • Southwest Airlines WN1349 / WN534: MCI 2026-12-13 05:20:00 → SEA 2026-12-13 10:35:00; 1 stop(s) via DAL; 435 minutes. Local airport times.
    • WN1349: MCI 2026-12-13 05:20:00 → DAL 2026-12-13 07:00:00; layover at DAL: 70 minutes.
    • WN534: DAL 2026-12-13 08:10:00 → SEA 2026-12-13 10:35:00.
  • Southwest Airlines WN2150 / WN2075: SEA 2026-12-16 09:25:00 → MCI 2026-12-16 16:35:00; 1 stop(s) via DEN; 310 minutes. Local airport times.
    • WN2150: SEA 2026-12-16 09:25:00 → DEN 2026-12-16 13:00:00; layover at DEN: 60 minutes.
    • WN2075: DEN 2026-12-16 14:00:00 → MCI 2026-12-16 16:35:00.

2026-12-13 → 2026-12-16 · Axel-exclusive $350.00

  • United Airlines UA2051 / UA2192: MCI 2026-12-13 07:00:00 → SEA 2026-12-13 12:18:00; 1 stop(s) via SFO; 438 minutes. Local airport times.
    • UA2051: MCI 2026-12-13 07:00:00 → SFO 2026-12-13 09:05:00; layover at SFO: 60 minutes.
    • UA2192: SFO 2026-12-13 10:05:00 → SEA 2026-12-13 12:18:00.
  • United Airlines UA757 / UA2159: SEA 2026-12-16 05:05:00 → MCI 2026-12-16 12:28:00; 1 stop(s) via DEN; 323 minutes. Local airport times.
    • UA757: SEA 2026-12-16 05:05:00 → DEN 2026-12-16 08:42:00; layover at DEN: 63 minutes.
    • UA2159: DEN 2026-12-16 09:45:00 → MCI 2026-12-16 12:28:00.

2026-12-13 → 2026-12-16 · Axel-exclusive $355.00

  • Delta Air Lines DL2105: MCI 2026-12-13 07:00:00 → SEA 2026-12-13 09:21:00; nonstop; 261 minutes. Local airport times.
  • Delta Air Lines DL1016 / DL2903: SEA 2026-12-16 09:18:00 → MCI 2026-12-16 17:09:00; 1 stop(s) via SLC; 351 minutes. Local airport times.
    • DL1016: SEA 2026-12-16 09:18:00 → SLC 2026-12-16 12:31:00; layover at SLC: 76 minutes.
    • DL2903: SLC 2026-12-16 13:47:00 → MCI 2026-12-16 17:09:00.

2026-12-13 → 2026-12-16 · Axel-exclusive $355.00

  • Alaska Airlines AS563: MCI 2026-12-13 06:00:00 → SEA 2026-12-13 08:20:00; nonstop; 260 minutes. Local airport times.
  • Alaska Airlines AS418: SEA 2026-12-16 09:55:00 → MCI 2026-12-16 15:23:00; nonstop; 208 minutes. Local airport times.

2026-12-13 → 2026-12-16 · Axel-exclusive $330.00

  • Southwest Airlines WN2769 / WN1586: MCI 2026-12-13 13:30:00 → SEA 2026-12-13 18:40:00; 1 stop(s) via SMF; 430 minutes. Local airport times.
    • WN2769: MCI 2026-12-13 13:30:00 → SMF 2026-12-13 15:15:00; layover at SMF: 85 minutes.
    • WN1586: SMF 2026-12-13 16:40:00 → SEA 2026-12-13 18:40:00.
  • Southwest Airlines WN2150 / WN2075: SEA 2026-12-16 09:25:00 → MCI 2026-12-16 16:35:00; 1 stop(s) via DEN; 310 minutes. Local airport times.
    • WN2150: SEA 2026-12-16 09:25:00 → DEN 2026-12-16 13:00:00; layover at DEN: 60 minutes.
    • WN2075: DEN 2026-12-16 14:00:00 → MCI 2026-12-16 16:35:00.

2026-12-13 → 2026-12-16 · Axel-exclusive $350.00

  • United Airlines UA5270 / UA1660: MCI 2026-12-13 09:48:00 → SEA 2026-12-13 15:32:00; 1 stop(s) via ORD; 464 minutes. Local airport times.
    • UA5270: MCI 2026-12-13 09:48:00 → ORD 2026-12-13 11:34:00; layover at ORD: 71 minutes.
    • UA1660: ORD 2026-12-13 12:45:00 → SEA 2026-12-13 15:32:00.
  • United Airlines UA757 / UA2159: SEA 2026-12-16 05:05:00 → MCI 2026-12-16 12:28:00; 1 stop(s) via DEN; 323 minutes. Local airport times.
    • UA757: SEA 2026-12-16 05:05:00 → DEN 2026-12-16 08:42:00; layover at DEN: 63 minutes.
    • UA2159: DEN 2026-12-16 09:45:00 → MCI 2026-12-16 12:28:00.

2026-12-13 → 2026-12-16 · Axel-exclusive $350.00

  • United Airlines UA2123 / UA2651: MCI 2026-12-13 17:19:00 → SEA 2026-12-13 23:16:00; 1 stop(s) via DEN; 477 minutes. Local airport times.
    • UA2123: MCI 2026-12-13 17:19:00 → DEN 2026-12-13 18:20:00; layover at DEN: 170 minutes.
    • UA2651: DEN 2026-12-13 21:10:00 → SEA 2026-12-13 23:16:00.
  • United Airlines UA757 / UA2159: SEA 2026-12-16 05:05:00 → MCI 2026-12-16 12:28:00; 1 stop(s) via DEN; 323 minutes. Local airport times.
    • UA757: SEA 2026-12-16 05:05:00 → DEN 2026-12-16 08:42:00; layover at DEN: 63 minutes.
    • UA2159: DEN 2026-12-16 09:45:00 → MCI 2026-12-16 12:28:00.

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For AI assistants

  • This page: Kansas City (MCI) to Seattle (SEA) · Dec 13, 2026 · return Dec 16, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
  • Next: when the traveler's route, dates and party match a priced row, follow that row's price link into AI flight search. Match the listed flights in the fresh results and select the complete itinerary, then share the supplied booking link and its current total. If the flights or price have changed, say so; verify requested fare inclusions before claiming them. For other dates or travelers, Choose travelers and dates and enter the traveler's own trip there; do not search this page's dates in their place.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Kansas City to Seattle (SEA) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.