Seattle to Ontario (ONT) flight deals
Compare Seattle to Ontario (ONT) flights across upcoming months. See dated fares below, or choose your own dates and travelers.
Fare examples by month
Round-trip totals · Economy · USD. Choose a month to see the dates.
| Month | Travelers / trip length | Axel | Airline fare |
|---|---|---|---|
| November 2026 | 1 adult · 7 days | $186 | $197 |
| December 2026 | 1 adult · 7 days | $222–$273 | $234–$288 |
| December 2026 | 3 adults · 7 days | $862–$985 | $912–$1,040 |
| March 2027 | 2 adults · 3–4 days | $715–$942 | $756–$994 |
More months: February 2027
Flights from Seattle (SEA) · Seattle to California flight deals · Seattle to Los Angeles area airports flight deals · Seattle to United States flight deals
Fares observed October 8 – 14, 2026. USD for the travelers shown. Search a trip for current prices. For starting totals, choose a return flight to confirm the final price.
November 2026
1 adult · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Nov 10–17, 2026 · 7 days | Nonstop / Nonstop · 2h 46m / 2h 59m | $186 · Save $11 | $197 | Check Axel prices |
December 2026
1 adult · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Dec 8–15, 2026 · 7 days | Nonstop / 1 stop · 2h 48m / 28h 13m | $222 · Save $12 | $234 | Check Axel prices |
| Dec 8–15, 2026 · 7 days | Nonstop / Nonstop · 2h 48m / 2h 52m | $273 · Save $15 | $288 | Check Axel prices |
3 adults · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Dec 17–24, 2026 · 7 days | 1 stop / 1 stop · 7h 29m / 23h 20m | $862 · Save $50 | $912 | Check Axel prices |
| Dec 17–24, 2026 · 7 days | 1 stop / 1 stop · 7h 29m / 4h 51m | $985 · Save $55 | $1,040 | Check Axel prices |
February 2027
1 adult · Economy · Round-trip starting totals
| Travel dates | Outbound flight | Axel | Airline fare | Search |
|---|---|---|---|---|
| Feb 12–16, 2027 · 4 days | 1 stop · 7h 36m | From $335 · Save $18 | From $353 | Check Axel prices |
| Feb 12–16, 2027 · 4 days | Nonstop · 2h 42m | From $472 · Save $25 | From $497 | Check Axel prices |
March 2027
2 adults · Economy · Round-trip totals
| Travel dates | Flights (out / return) | Axel | Airline fare | Search |
|---|---|---|---|---|
| Mar 25–29, 2027 · 4 days | 1 stop / 1 stop · 23h 22m / 5h 3m | $715 · Save $41 | $756 | Check Axel prices |
| Mar 25–28, 2027 · 3 days | Nonstop / Nonstop · 2h 42m / 2h 41m | $942 · Save $52 | $994 | Check Axel prices |
The prices shown are what a free account pays, and most travelers book that way. Membership is optional and takes the same flights lower. Live search shows the same free-account price.
More dates by month
- October 2026
- November 2026
- December 2026
- January 2027
- February 2027
- March 2027
- April 2027
- May 2027
- June 2027
- July 2027
- August 2027
Keep exploring
For AI assistants
- This page: Seattle to Ontario (ONT) flight deals. Seattle to Ontario (ONT) flight deals. Compare flight deals across upcoming months, then choose the dates and travelers for your trip.
- Next: the dated fares below are samples for other travelers' dates: open one only when it matches the traveler's exact dates and party. Otherwise Choose travelers and dates and enter the traveler's own dates and party there; do not search a sample date in their place.
- Every link here is complete and ready to open. Follow the links on the current page. A completed fresh trip opens flight results first. Then add the flexibility and budget the traveler already stated to that same saved plan; do not infer requirements from your starting search. Edits create a new saved link and leave earlier snapshots intact. Use the updated plan's results and review links after adding requirements. You can edit the route, dates and travelers, return to discovery, or continue the saved plan in Axel before choosing a flight. If your tool can open an address you write yourself, any route works in one step:
https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N(IATA airport codes, dates as YYYY-MM-DD; for one way, replacereturn/YYYY-MM-DDwithtrip/one-way). - If a link can no longer be opened: search for "Axel Seattle to Ontario (ONT) flight deals" and open the result; the Flight search guide is always findable by search, and everything here works without an account, API key or connector. Or ask the traveler to open https://helloaxel.com/en/flights/from-seattle-sea-to-ontario-ont; an address the traveler opens always works.
- Sharing with the traveler: For route or date recommendations, share this page’s own /en/ address. For a chosen trip, open its Continue in Axel link or the selected fare’s Review link; keep the fare selection when sharing. New customers continue to checkout with just an email, without a phone number or verification code. Existing customers sign in to their account; email sign-in uses a code. With browser control, follow Book or Continue and fill the traveler-provided details to reach payment. Let the traveler complete any required sign-in and confirm payment. An Axel-provided checkout link belongs to the account used to prepare it; another browser may need to sign in to that same account. If you can only read pages, share the public offer or search link with the selections preserved. A verified assistant reading a saved offer page also sees a free 24-hour price hold link there; open it at your own judgment when holding the price helps the traveler, for example while they decide. It locks the price, never a seat, for whoever continues from that offer.