Seattle (SEA) to Santiago (STI), Dec 29, 2026: round trips from $744, one way from $455

Seattle (SEA) to Santiago (STI), Dec 29, 2026: round trips from $744, one way from $455 on Axel, checked Oct 29, 2026. Lowest published fares: $744 round trip, Axel-exclusive, American Airlines, 1 stop, Dec 29, 2026 – Jan 6, 2027; $455 one way, Axel-exclusive, American Airlines, 1 stop, Dec 29, 2026; 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Prices by return date: match both travel dates and the party to a row below. Each total is for that exact trip, issued at the time shown.

Date links open published trip details for exploration. Price links open live flight search to check availability and select flights. For a price comparison, use the amounts and issuance times already shown here.

Route overview: Seattle to Santiago (STI) flight deals

2026-12-29 · one way · Axel-exclusive $455.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.

2026-12-29 · one way · Axel-exclusive $469.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.

2026-12-29 → 2026-12-31 · Axel-exclusive $868.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2026-12-31 17:02:00 → SEA 2027-01-01 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2026-12-31 17:02:00 → MIA 2026-12-31 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2026-12-31 21:01:00 → SEA 2027-01-01 00:59:00.

2026-12-29 → 2026-12-31 · Axel-exclusive $896.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2026-12-31 12:55:00 → SEA 2026-12-31 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2026-12-31 12:55:00 → EWR 2026-12-31 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2026-12-31 18:25:00 → SEA 2026-12-31 21:49:00.

2026-12-29 → 2027-01-01 · Axel-exclusive $868.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-01 17:02:00 → SEA 2027-01-02 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-01 17:02:00 → MIA 2027-01-01 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-01 21:01:00 → SEA 2027-01-02 00:59:00.

2026-12-29 → 2027-01-01 · Axel-exclusive $896.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-01 12:55:00 → SEA 2027-01-01 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-01 12:55:00 → EWR 2027-01-01 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-01 18:25:00 → SEA 2027-01-01 21:49:00.

2026-12-29 → 2027-01-02 · Axel-exclusive $868.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-02 17:02:00 → SEA 2027-01-03 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-02 17:02:00 → MIA 2027-01-02 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-02 21:01:00 → SEA 2027-01-03 00:59:00.

2026-12-29 → 2027-01-02 · Axel-exclusive $896.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-02 12:55:00 → SEA 2027-01-02 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-02 12:55:00 → EWR 2027-01-02 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-02 18:25:00 → SEA 2027-01-02 21:49:00.

2026-12-29 → 2027-01-04 · Axel-exclusive $868.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-04 17:02:00 → SEA 2027-01-05 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-04 17:02:00 → MIA 2027-01-04 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-04 21:01:00 → SEA 2027-01-05 00:59:00.

2026-12-29 → 2027-01-04 · Axel-exclusive $896.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-04 12:55:00 → SEA 2027-01-04 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-04 12:55:00 → EWR 2027-01-04 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-04 18:25:00 → SEA 2027-01-04 21:49:00.

2026-12-29 → 2027-01-05 · Axel-exclusive $868.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-05 17:02:00 → SEA 2027-01-06 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-05 17:02:00 → MIA 2027-01-05 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-05 21:01:00 → SEA 2027-01-06 00:59:00.

2026-12-29 → 2027-01-05 · Axel-exclusive $896.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-05 12:55:00 → SEA 2027-01-05 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-05 12:55:00 → EWR 2027-01-05 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-05 18:25:00 → SEA 2027-01-05 21:49:00.

2026-12-29 → 2027-01-07 · Axel-exclusive $744.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-07 17:02:00 → SEA 2027-01-08 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-07 17:02:00 → MIA 2027-01-07 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-07 21:01:00 → SEA 2027-01-08 00:59:00.

2026-12-29 → 2027-01-07 · Axel-exclusive $768.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-07 12:55:00 → SEA 2027-01-07 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-07 12:55:00 → EWR 2027-01-07 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-07 18:25:00 → SEA 2027-01-07 21:49:00.

2026-12-29 → 2027-01-08 · Axel-exclusive $744.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-08 17:02:00 → SEA 2027-01-09 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-08 17:02:00 → MIA 2027-01-08 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-08 21:01:00 → SEA 2027-01-09 00:59:00.

2026-12-29 → 2027-01-08 · Axel-exclusive $768.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-08 12:55:00 → SEA 2027-01-08 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-08 12:55:00 → EWR 2027-01-08 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-08 18:25:00 → SEA 2027-01-08 21:49:00.

2026-12-29 → 2027-01-09 · Axel-exclusive $744.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-09 17:02:00 → SEA 2027-01-10 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-09 17:02:00 → MIA 2027-01-09 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-09 21:01:00 → SEA 2027-01-10 00:59:00.

2026-12-29 → 2027-01-09 · Axel-exclusive $768.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-09 12:55:00 → SEA 2027-01-09 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-09 12:55:00 → EWR 2027-01-09 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-09 18:25:00 → SEA 2027-01-09 21:49:00.

2026-12-29 → 2027-01-11 · Axel-exclusive $744.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-11 17:02:00 → SEA 2027-01-12 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-11 17:02:00 → MIA 2027-01-11 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-11 21:01:00 → SEA 2027-01-12 00:59:00.

2026-12-29 → 2027-01-11 · Axel-exclusive $768.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-11 12:55:00 → SEA 2027-01-11 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-11 12:55:00 → EWR 2027-01-11 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-11 18:25:00 → SEA 2027-01-11 21:49:00.

2026-12-29 → 2027-01-12 · Axel-exclusive $744.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-12 17:02:00 → SEA 2027-01-13 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-12 17:02:00 → MIA 2027-01-12 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-12 21:01:00 → SEA 2027-01-13 00:59:00.

2026-12-29 → 2027-01-12 · Axel-exclusive $768.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-12 12:55:00 → SEA 2027-01-12 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-12 12:55:00 → EWR 2027-01-12 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-12 18:25:00 → SEA 2027-01-12 21:49:00.

2026-12-29 → 2027-01-26 · Axel-exclusive $744.00

• American Airlines AA2500 / AA2138: SEA 2026-12-29 23:17:00 → STI 2026-12-30 15:16:00; 1 stop(s) via PHL; 719 minutes. Local airport times.
  • AA2500: SEA 2026-12-29 23:17:00 → PHL 2026-12-30 07:19:00; layover at PHL: 196 minutes.
  • AA2138: PHL 2026-12-30 10:35:00 → STI 2026-12-30 15:16:00.
• American Airlines AA840 / AA2363: STI 2027-01-26 17:02:00 → SEA 2027-01-27 00:59:00; 1 stop(s) via MIA; 717 minutes. Local airport times.
  • AA840: STI 2027-01-26 17:02:00 → MIA 2027-01-26 18:25:00; layover at MIA: 156 minutes.
  • AA2363: MIA 2027-01-26 21:01:00 → SEA 2027-01-27 00:59:00.

2026-12-29 → 2027-01-26 · Axel-exclusive $768.00

• United Airlines UA1538 / UA1624: SEA 2026-12-29 23:15:00 → STI 2026-12-30 14:53:00; 1 stop(s) via EWR; 698 minutes. Local airport times.
  • UA1538: SEA 2026-12-29 23:15:00 → EWR 2026-12-30 07:21:00; layover at EWR: 163 minutes.
  • UA1624: EWR 2026-12-30 10:04:00 → STI 2026-12-30 14:53:00.
• United Airlines UA620 / UA2614: STI 2027-01-26 12:55:00 → SEA 2027-01-26 21:49:00; 1 stop(s) via EWR; 774 minutes. Local airport times.
  • UA620: STI 2027-01-26 12:55:00 → EWR 2027-01-26 16:00:00; layover at EWR: 145 minutes.
  • UA2614: EWR 2027-01-26 18:25:00 → SEA 2027-01-26 21:49:00.

Explore this route

• All dates for this route
• Dec 28, 2026 · Return options
• Dec 30, 2026 · Return options

For AI assistants

• This page: Seattle (SEA) to Santiago (STI) · Dec 29, 2026 · choose your return date: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued.
• Next: each row is one exact trip for this departure (both dates with the year, the total and the time its price was issued); its exact-trip price link opens the live search for those dates and travelers, where the booking link and the current total are. Other durations or travelers are not priced here: Choose travelers and dates prices the requested trip.
• 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 Seattle to Santiago (STI) 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.

Feedback (optional): Missing info · Axel issue