Ontario to Lisbon ONT → LIS
Ontario International Airport (ONT) → Lisbon Portela Airport (LIS)
The cheapest return found recently is $857 with United Airlines, 20 Oct – 3 Nov, found yesterday.
Return
The cheapest return fare on each of 5 departure dates is usually $857 to $923.
Cheapest return found recently
$857
20 Oct – 3 Nov · United Airlines
Ontario International Airport (ONT) → Lisbon Portela Airport (LIS)
Leaves 4:03 p.m. · Return leaves 3:35 p.m. · 55 h 42 min of travel, both ways together
out 2 stops, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$857 20 Oct – 3 Novfound yesterdaySee prices for these dates
$844 6 Feb 2027 – 14 Feb 2027found 4 days agoSee prices for these dates
What have prices looked like?
Over 25 days, 24 Sept to 18 Oct, the cheapest return we saw each day was $766 to $1,366.
25 days is a short history, so treat this range as an early guide.
Those were the prices on those days, not today's.
Is this a good return price?
Compared with the cheapest return fare on each of 5 departure dates from 20 Oct to 6 Feb 2027, found by travelers' searches in the last 7 days (economy, the price the seller showed on Aviasales). The usual range is the middle half of those prices.
Could nearby dates be cheaper?
We hold no other 14-night return fares leaving within 3 days of 20 Oct to compare.
Every date we hold
9 fares on 5 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 20 Oct – 3 Nov | $857 | United Airlines | Ontario International Airport (ONT) → Lisbon Portela Airport (LIS) | out 2 stops, back 1 stop | found yesterday | See prices for these dates |
| 3 Nov – 24 Nov | $859 | United Airlines | Ontario International Airport (ONT) → Lisbon Portela Airport (LIS) | out 2 stops, back 1 stop | found 2 days ago | See prices for these dates |
| 10 Nov – 15 Nov | $923 | United Airlines | Ontario International Airport (ONT) → Lisbon Portela Airport (LIS) | out 2 stops, back 1 stop | found 4 days ago | See prices for these dates |
| 23 Nov – 27 Nov | $1,102 | Frontier Airlines | Ontario International Airport (ONT) → Lisbon Portela Airport (LIS) | out 3 stops, back 2 stops | found 5 days ago | See prices for these dates |
| 6 Feb 2027 – 14 Feb 2027 | $844 | United Airlines | Ontario International Airport (ONT) → Lisbon Portela Airport (LIS) | out 2 stops, back 1 stop | found 4 days ago | See prices for these dates |
Which month looks cheapest?
February 2027 is the cheapest month — from $844.
Airlines on the cheapest dates: United Airlines, Frontier Airlines.
Premium cabin fares from Ontario to Lisbon
We hold no premium economy, business or first-class fares for this route: we collect them for the busiest routes, and this one is not among them yet.
Today's prices for 20 Oct – 3 Nov in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Lisbon?
Return
Fares 90 to 179 days before departure were typically 30% lower than 0 to 6 days before departure.
From the cheapest return each day between 24 Sept and 18 Oct (25 days), grouped by how many days ahead the flight left; one adult in economy.
Each range covers different departure dates, so this compares typical fares, not the same trip priced twice.
Prices reflect recent searches — current fares may differ.
See these ranges as a table
| Booked ahead by | Typical fare | Cheapest day | Above the cheapest | Days of prices |
|---|---|---|---|---|
| 0–6 days | $1,096 | $857 | +43% | 14 |
| 30–59 days | $1,366 | $1,366 | +78% | 7 |
| 60–89 days | $802 | $802 | +5% | 11 |
| 90–179 days | $766 | $766 | Cheapest seen | 14 |
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Lisbon
56 km from Ontario
$799
$58 less than flying from Ontario
20 Oct – 3 Nov · LAX → LIS · out 1 stop, back 1 stop
found yesterday
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Lisbon
56 km from Ontario
$391
3 Nov · LAX → LIS · stops unknown
found today
Cheapest recent price on each route — one way, per traveler in Economy. Distances are in a straight line.
Live price for these dates
The cheapest return found recently is for 20 Oct – 3 Nov. A live search on this page shows what those dates cost now, for one adult in economy.
Prices are what travelers' searches on Aviasales found in the last 7 days, in US dollars: the price the seller showed on Aviasales; bags may cost extra. Fares change, so check today's price before you book. How our prices work