Cheap flights from Ontario to Frankfurt from $775 ONT → FRA
Ontario International Airport (ONT) → Frankfurt Airport (FRA)
The cheapest return found recently is $1,018 with United Airlines, 3 Dec – 24 Dec, found yesterday. The cheapest one-way found recently is $775 with United Airlines, 25 May 2027, found yesterday.
- Cheapest one-way found recently
- $775, found yesterday
- Cheapest return found recently
- $1,018, 3 Dec to 24 Dec
- Usual return price
- $1,020 to $1,636
- Cheapest month to fly
- November 2026, return fares from $949 found in the last 7 days
Return
The cheapest return fare on each of 6 departure dates is usually $1,020 to $1,636.
Cheapest return found recently
$1,018
3 Dec – 24 Dec · United Airlines
Ontario International Airport (ONT) → Frankfurt Airport (FRA)
Leaves 5:45 a.m. · Return leaves 5:10 p.m. · 44 h 24 min of travel, both ways together
out 1 stop, back 1 stop
found yesterday
Cheapest nonstop return
None seen yet.
Found recently, and the cheapest we hold
$1,018 3 Dec – 24 Decfound yesterdaySee prices for these dates
$949 25 Nov – 9 Decfound 5 days agoSee prices for these dates
What have prices looked like?
Over 45 days, 29 Sept to 12 Nov, the cheapest return we saw each day was $773 to $1,460.
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 6 departure dates from 25 Nov to 7 Jan 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 21-night return fares leaving within 3 days of 3 Dec to compare.
Every date we hold
8 fares on 6 departure dates
See the chart as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 25 Nov – 9 Dec | $949 | Frontier Airlines | Ontario International Airport (ONT) → Frankfurt Airport (FRA) | out 1 stop, back 3 stops | found 5 days ago | See prices for these dates |
| 2 Dec – 5 Dec | $1,382 | American Airlines | Ontario International Airport (ONT) → Frankfurt Airport (FRA) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 3 Dec – 24 Dec | $1,018 | United Airlines | Ontario International Airport (ONT) → Frankfurt Airport (FRA) | out 1 stop, back 1 stop | found yesterday | See prices for these dates |
| 20 Dec – 23 Dec | $1,774 | United Airlines | Ontario International Airport (ONT) → Frankfurt Airport (FRA) | out 1 stop, back 1 stop | found 4 days ago | See prices for these dates |
| 21 Dec – 29 Dec | $1,720 | American Airlines | Ontario International Airport (ONT) → Frankfurt Airport (FRA) | out 1 stop, back 1 stop | found 3 days ago | See prices for these dates |
| 7 Jan 2027 – 28 Jan 2027 | $1,026 | United Airlines | Ontario International Airport (ONT) → Frankfurt Airport (FRA) | out 1 stop, back 1 stop | found 5 days ago | See prices for these dates |
Which month looks cheapest?
November 2026 is the cheapest month — from $949.
Airlines on the cheapest dates: United Airlines, American Airlines, Frontier Airlines.
One-way
Not enough comparable prices yet for a usual one-way price.
Cheapest one-way found recently
$775
25 May 2027 · United Airlines
Ontario International Airport (ONT) → Frankfurt Airport (FRA)
Leaves 6:00 a.m. · 19 h 25 min trip
1 stop
found yesterday
Cheapest nonstop one-way
None seen yet.
Found recently, and the cheapest we hold
$775 25 May 2027found yesterdayOpen this trip
$677 25 May 2027found 6 days agoOpen this trip
What have prices looked like?
Over 41 days, 24 Sept to 12 Nov, the cheapest one-way we saw each day was $666 to $1,362.
Those were the prices on those days, not today's.
Is this a good one-way price?
Not enough comparable prices yet: we hold one-way fares on 1 departure date and need at least 3 to say what is usual.
Could nearby dates be cheaper?
We hold no other one-way fares leaving within 3 days of 25 May 2027 to compare.
Every date we hold
3 fares on 1 departure dates
See every date as a table
| Dates | From | Airline | Airports | Stops | Found | |
|---|---|---|---|---|---|---|
| 25 May 2027 | $677 | Alaska Airlines | Ontario International Airport (ONT) → Frankfurt Airport (FRA) | 3 stops | found 6 days ago | Open this trip |
Airlines on the cheapest dates: Alaska Airlines.
Premium cabin fares from Ontario to Frankfurt
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 3 Dec – 24 Dec in another cabin: Premium economy · Business · First
Today's prices for 25 May 2027 in another cabin: Premium economy · Business · First
How far ahead were prices cheapest for Ontario to Frankfurt?
Return
Fares 60 to 89 days before departure were typically 10% lower than 0 to 6 days before departure.
From the cheapest return each day between 29 Sept and 12 Nov (45 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 | $1,060 | $978 | +11% | 13 |
| 7–13 days | $969 | $889 | +2% | 25 |
| 14–29 days | $959 | $773 | +0% | 28 |
| 30–59 days | $1,023 | $773 | +7% | 40 |
| 60–89 days | $955 | $955 | Cheapest seen | 13 |
| 90–179 days | $1,020 | $1,020 | +7% | 13 |
One-way
Not enough history yet: in 41 days of one-way prices, 24 Sept to 12 Nov, fewer than 3 booking ranges had prices on 7 days or more.
Could a nearby airport be cheaper?
A different airport at either end can change the fare — sometimes a lot.
Return
Los Angeles → Frankfurt
56 km from Ontario
$908
$110 less than flying from Ontario
3 Dec – 24 Dec · LAX → FRA · out 1 stop, back 1 stop
found 19 hours ago
Long Beach → Frankfurt
60 km from Ontario
$1,409
$391 more than flying from Ontario
1 Apr 2027 – 4 Apr 2027 · LGB → FRA · out 3 stops, back 3 stops
found 6 days ago
Cheapest recent price on each route — round trip, per traveler in Economy. Distances are in a straight line.
One-way
Los Angeles → Frankfurt
56 km from Ontario
$511
$264 less than flying from Ontario
25 May 2027 · LAX → FRA · 1 stop
found yesterday
Long Beach → Frankfurt
60 km from Ontario
$1,682
$907 more than flying from Ontario
25 May 2027 · LGB → FRA · 1 stop
found yesterday
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 3 Dec – 24 Dec. A live search on this page shows what those dates cost now, for one adult in economy.
Questions about this trip
How much is a return flight from Ontario to Frankfurt?
The cheapest return found recently is $1,018 with United Airlines, 3 Dec to 24 Dec, found yesterday. The cheapest return we hold, of any age, is $949 with Frontier Airlines, 25 Nov to 9 Dec, found 5 days ago. The cheapest return fare on each of 6 departure dates is usually $1,020 to $1,636.
How much is a one-way flight from Ontario to Frankfurt?
The cheapest one-way found recently is $775 with United Airlines, 25 May 2027, found yesterday. The cheapest one-way we hold, of any age, is $677 with Alaska Airlines, 25 May 2027, found 6 days ago.
What is the cheapest month to fly from Ontario to Frankfurt?
November 2026 is the cheapest month for a return, from $949, 25 Nov to 9 Dec, found 5 days ago.
How far ahead should I book a flight from Ontario to Frankfurt?
In 45 days of prices between 29 Sept and 12 Nov, return fares 60 to 89 days before departure were typically 10% lower than 0 to 6 days before departure.
How long is the flight from Ontario to Frankfurt?
The cheapest one-way found recently, with United Airlines on 25 May 2027, takes 19 h 25 min with 1 stop.
Which airlines have the cheapest flights from Ontario to Frankfurt?
Between 25 Nov and 7 Jan 2027, United Airlines has the cheapest return on 3 of the 6 departure dates we hold, American Airlines on 2 and Frontier Airlines on 1.
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