Flights Portland → Ontario
As of October 2026, economy flights from Portland to Ontario have a typical range USD 243–778, median USD 355. Full range across all 60 offers: USD 180–1201. We found 37% of 60 offers from budget carriers (around USD 249) and 63% from full-service carriers (around USD 355).
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Portland → Ontario
Based on 60 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Portland → Ontario
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Frontier Airlines | — | — | — |
| Southwest Airlines | Included | Included | — |
| Southwest | — | USD 45 | — |
| United | Included | USD 35 | — |
| Delta | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
| Alaska | — | USD 45 | — |
| Alaska Airlines | Included | USD 35 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Portland to Ontario cost?
Based on 60 offers · October 2026
Portland to Ontario flights ranged from USD 180 to USD 1201 across 60 offers analyzed in October 2026. Two fare clusters detected: budget fares around 231 and premium fares around 946 The chart below shows how prices distributed across all 60 offers.
These 60 offers (October 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 244 and USD 451
What hidden fees do Portland to Ontario flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Portland to Ontario routes. The breakdown below is based on 60 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| F9 | 10 | 6% |
| WN | 0 | 0% |
| Southwest | 45 | 18% |
| UA | 45 | 12% |
| DL | 45 | 9% |
| AA | 45 | 6% |
| Alaska | 45 | 11% |
| AS | 45 | 9% |
Southwest: base ~USD 204 + fees USD 45 = ~USD 249 total. United Airlines: base ~USD 310 + fees USD 45 = ~USD 355 total.
Total costs diverge further when fees are added on this route. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Southwest charges 4.5x more in ancillary fees than F9 on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Portland to Ontario?
8 airlines flew Portland to Ontario in this dataset. The route shows a clear split between low-cost and full-service carriers. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 Frontier Airlines | 1 | — | 180 | 10 (6%) |
 Southwest Airlines | 11 | — | 243 | 0 (0%) |
 Southwest | 10 | 244–249 | 249 | 45 (18%) |
 United Airlines | 7 | 355–425 | 355 | 45 (13%) |
 Delta Air Lines | 12 | 355–667 | 355 | 45 (13%) |
 Alaska | 2 | — | 424 | 45 (11%) |
 Alaska Airlines | 9 | 447–519 | 447 | 45 (10%) |
 American Airlines | 8 | 465–925 | 778 | 45 (6%) |
Where do the best Portland → Ontario prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from travel agency sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Portland to Ontario flights
- Full-service carriers on Portland–Ontario cost 2.1x more than budget airlines (USD 472 vs USD 224 median; overall median USD 355).
- Southwest charges 4.5x more in ancillary fees than F9 — USD 45 vs USD 10 avg per booking.
- The same route priced USD 106 apart depending on where it was booked — the lowest median was USD 249. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Portland to Ontario cost?
- Based on 60 offers analyzed, Portland to Ontario flights range from USD 180 to USD 1201, with a median price of USD 355. Search for your specific dates →
- What hidden fees should I expect on Portland to Ontario flights?
- On average, ancillary fees (bags, seat selection) add USD 36 to the base fare on Portland to Ontario flights. See itemized fees for your itinerary →
- Which airline is cheapest on Portland to Ontario including all fees?
- Frontier Airlines has the lowest median fare on Portland to Ontario at USD 180 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Portland–Ontario flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 249. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Portland to Ontario routes?
- Portland to Ontario has 8 airlines competing, creating a price range from USD 180 to USD 1201 across 60 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
8 airlines, two price clusters — find which fits your budget
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