Your next trip, last seen at €168
Lowest observedFrontier Airlines · 3 stops · One wayWhen to fly
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The lowest fare we observed for each month. Open a month to see its days, then pick your outbound and return. A day with no price is one we will search for you.
One-way fare
- Lowest observed
- €168, departing 7 Dec 2026 (Last checked: 19 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 88Check live prices for this route
- Airlines seen
- Air Canada, Air Transat, Frontier Airlines, Porter Airlines Canada, Sun Country Airlines, United Airlines, Volaris, WestJet (8)
- Typical journey time
- 18h 55m
About this route
Explore the fares we observed from Denver to Ottawa. Prices move often, so pick your dates to see the latest options.
- Route distance
- 2,465 km
- Typical journey time
- 18h 55m
- Airlines seen
- Air Canada, Air Transat, Frontier Airlines, Porter Airlines Canada, Sun Country Airlines, United Airlines, Volaris, WestJet (8)
- Seen on fares with a connection
- Frontier Airlines, Air Canada, WestJet, Porter Airlines Canada, United Airlines
- Alternative airports
- APA, YND
Route-level information; individual journeys vary.
We have not observed non-stop service on this route; the fares shown include at least one stop.
A clearer picture of your fare
Airport to city: straight-line distance
- Denver International Airport (DEN) → Denver, city gazetteer reference point (39.7392, -104.9847): ≈ 30 km.
- Ottawa Macdonald-Cartier International Airport (YOW) → Ottawa, city gazetteer reference point (45.4116, -75.6982): ≈ 10 km.
- Ottawa / Gatineau Airport (YND) → Ottawa, city gazetteer reference point (45.4116, -75.6982): ≈ 16 km.
Approximate distances calculated from coordinates, not road distances or travel times. These airports serve the city; they are not confirmed endpoints of an offer.
Lowest fare by departure month
Cheapest month from Denver to Ottawa: December 2026, from €168 (checked 19 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €329 | 10 |
| November 2026 | €188 | 30 |
| December 2026 | €168 | 30 |
| January 2027 | €210 | 18 |
Lowest fare by day of the week
Cheapest day of the week from Denver to Ottawa: Monday, from €168 (checked 19 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €168 | 13 |
| Tuesday | €175 | 12 |
| Wednesday | €169 | 13 |
| Thursday | €233 | 13 |
| Friday | €236 | 13 |
| Saturday | €216 | 13 |
| Sunday | €244 | 11 |
One-way fares checked in the last 14 days. Each figure is the lowest priced departure day we saw, not a guaranteed fare.
Lowest fare by days before departure
Lowest fare from Denver to Ottawa by days until departure (31 to 60 days): €168 (checked 19 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €438 | 6 |
| 8 to 30 days | €188 | 23 |
| 31 to 60 days | €168 | 30 |
| 61 days or more | €210 | 29 |
One-way fares checked in the last 14 days. Each figure is the lowest stored fare for that distance to departure, not a price forecast.
Fares for different departure dates, checked now; not a guide to when to book.
Lowest one-way fare we saw per airline
Cheapest airline from Denver to Ottawa: Frontier Airlines, from €168 (checked 19 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Frontier Airlines | €168Dec 7, 2026 | 66 |
| Porter Airlines Canada | €237Nov 13, 2026 | 5 |
| Air Canada | €346Nov 29, 2026 | 13 |
One-way fares checked in the last 14 days. An airline listed here had a fare on at least 3 departure days. Each figure is the lowest we saw, not a guaranteed fare. Connecting itineraries are included; the date is the departure day of that fare.
Frequently asked
How much is a flight from Denver to Ottawa?
The lowest fare we have observed is €168, found on 19 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Denver to Ottawa?
Cheapest month from Denver to Ottawa: December 2026, from €168 (checked 19 Oct 2026).
Are there direct flights from Denver to Ottawa?
Our data holds no non-stop flight from Denver to Ottawa. The fares on this page include at least one stop.
Which airlines fly from Denver to Ottawa?
These are the carriers we have seen on the route: Air Canada, Air Transat, Frontier Airlines, Porter Airlines Canada, Sun Country Airlines, United Airlines, Volaris, WestJet (8).
How long does the flight from Denver to Ottawa take?
The average journey time across the 104 fares we observed is 22h 13m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
How many of the observed Denver to Ottawa fares were non-stop?
None of the 107 fares we observed was non-stop; every one included at least one stop. That describes our observations, not every flight that operates.
Which day of the week is cheapest from Denver to Ottawa?
Cheapest day of the week from Denver to Ottawa: Monday, from €168 (checked 19 Oct 2026).
Which airline has the lowest fare from Denver to Ottawa?
Cheapest airline from Denver to Ottawa: Frontier Airlines, from €168 (checked 19 Oct 2026).
How observed prices work, what "No data" means and what a fare includes: Read the flight price guide
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Recently observed fares. Prices may change.
Last checked: 19 Oct 2026