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Route overview: Seattle to Singapore (SIN) flight deals

Seattle → Singapore

Jun 21, 2027 · one way

SEA → SIN1 adulteconomyOne way

7 flight options · 7 airlines

Nonstop flights

Mon, Jun 21 · One way

Singapore Airlines
8:40 amSEA
17h 5m
Nonstop
4:45 pm+1SIN

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Mon, Jun 21 · One way

United Airlines
7:00 amSEA
21h 15m
SFO · 1h 18m
7:15 pm+1SIN

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jun 21 · One way

Air Canada
7:05 pmSEA
19h 55m
YVR · 2h 6m
6:00 am+2SIN

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jun 21 · One way

EVA Air
12:10 amSEA
19h 55m
TPE · 2h 5m
11:05 am+1SIN

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jun 21 · One way

Alaska Airlines
11:55 amSEA
20h 55m
NRT · 2h 45m
11:50 pm+1SIN

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jun 21 · One way

Korean Air
11:00 amSEA
21h 15m
ICN · 2h 40m
11:15 pm+1SIN

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Mon, Jun 21 · One way

Japan Airlines
12:00 pmSEA
20h 50m
NRT · 2h 40m
11:50 pm+1SIN

One-way total · 1 adult · Taxes included

Availability is checked when you select these flights.

Make this trip yours

SEA ⇄ SIN

Economy

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

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Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, Singapore Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeJun 20, 2027 · Return optionsJun 22, 2027 · Return optionsHotels in Singapore 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)
2027-06-21 · one waySingapore AirlinesSQ27Axel-exclusive $910.002026-10-29T01:16:43Z
2027-06-21 · one wayUnited AirlinesUA499 + UA29Axel-exclusive $750.002026-10-29T01:16:43Z
2027-06-21 · one wayAir CanadaAC8811 + AC19Axel-exclusive $760.002026-10-29T01:16:43Z
2027-06-21 · one wayEVA AirBR25 + BR225Axel-exclusive $780.002026-10-29T01:16:43Z
2027-06-21 · one wayAlaska AirlinesAS123 + JL711Axel-exclusive $810.002026-10-29T01:16:43Z
2027-06-21 · one wayKorean AirKE42 + KE645Axel-exclusive $810.002026-10-29T01:16:43Z
2027-06-21 · one wayJapan AirlinesJL67 + JL711Axel-exclusive $830.002026-10-29T01:16:43Z

Route overview: Seattle to Singapore (SIN) flight deals

2027-06-21 · one way · Axel-exclusive $910.00

  • Singapore Airlines SQ27: SEA 2027-06-21 08:40:00 → SIN 2027-06-22 16:45:00; nonstop; 1025 minutes. Local airport times.

2027-06-21 · one way · Axel-exclusive $750.00

  • United Airlines UA499 / UA29: SEA 2027-06-21 07:00:00 → SIN 2027-06-22 19:15:00; 1 stop(s) via SFO; 1275 minutes. Local airport times.
    • UA499: SEA 2027-06-21 07:00:00 → SFO 2027-06-21 09:22:00; layover at SFO: 78 minutes.
    • UA29: SFO 2027-06-21 10:40:00 → SIN 2027-06-22 19:15:00.

2027-06-21 · one way · Axel-exclusive $760.00

  • Air Canada AC8811 / AC19: SEA 2027-06-21 19:05:00 → SIN 2027-06-23 06:00:00; 1 stop(s) via YVR; 1195 minutes. Local airport times.
    • AC8811: SEA 2027-06-21 19:05:00 → YVR 2027-06-21 20:09:00; layover at YVR: 126 minutes.
    • AC19: YVR 2027-06-21 22:15:00 → SIN 2027-06-23 06:00:00.

2027-06-21 · one way · Axel-exclusive $780.00

  • EVA Air BR25 / BR225: SEA 2027-06-21 00:10:00 → SIN 2027-06-22 11:05:00; 1 stop(s) via TPE; 1195 minutes. Local airport times.
    • BR25: SEA 2027-06-21 00:10:00 → TPE 2027-06-22 04:20:00; layover at TPE: 125 minutes.
    • BR225: TPE 2027-06-22 06:25:00 → SIN 2027-06-22 11:05:00.

2027-06-21 · one way · Axel-exclusive $810.00

  • Alaska Airlines AS123 / JL711: SEA 2027-06-21 11:55:00 → SIN 2027-06-22 23:50:00; 1 stop(s) via NRT; 1255 minutes. Local airport times.
    • AS123: SEA 2027-06-21 11:55:00 → NRT 2027-06-22 14:25:00; layover at NRT: 165 minutes.
    • JL711: NRT 2027-06-22 17:10:00 → SIN 2027-06-22 23:50:00.

2027-06-21 · one way · Axel-exclusive $810.00

  • Korean Air KE42 / KE645: SEA 2027-06-21 11:00:00 → SIN 2027-06-22 23:15:00; 1 stop(s) via ICN; 1275 minutes. Local airport times.
    • KE42: SEA 2027-06-21 11:00:00 → ICN 2027-06-22 14:55:00; layover at ICN: 160 minutes.
    • KE645: ICN 2027-06-22 17:35:00 → SIN 2027-06-22 23:15:00.

2027-06-21 · one way · Axel-exclusive $830.00

  • Japan Airlines JL67 / JL711: SEA 2027-06-21 12:00:00 → SIN 2027-06-22 23:50:00; 1 stop(s) via NRT; 1250 minutes. Local airport times.
    • JL67: SEA 2027-06-21 12:00:00 → NRT 2027-06-22 14:30:00; layover at NRT: 160 minutes.
    • JL711: NRT 2027-06-22 17:10:00 → SIN 2027-06-22 23:50:00.

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For AI assistants

  • This page: Seattle (SEA) to Singapore (SIN) · Jun 21, 2027 · one way: 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 Seattle to Singapore (SIN) 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.