Your next trip, last seen at €114
Lowest observedAllegiant Air · 1 stop · 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.
- Lowest observed
- €114, departing 3 Feb 2027 (Last checked: 12 Oct 2026)One-way fare · Priced departure days checked in the last 14 days: 119Check live prices for this route
- Airlines seen
- Air Canada, Alaska Airlines, Allegiant Air, Flair Airlines, Frontier Airlines, United Airlines +1 more
- Typical journey time
- 4h 32m
About this route
Explore the fares we observed from Billings to Portland. Prices move often, so pick your dates to see the latest options.
- Route distance
- 1,101 km
- Typical journey time
- 4h 32m
- Airlines seen
- Air Canada, Alaska Airlines, Allegiant Air, Flair Airlines, Frontier Airlines, United Airlines +1 more
- Seen on fares with a connection
- Alaska Airlines, United Airlines, Allegiant Air, Air Canada, Frontier Airlines
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
Non-stop airlines seen on this route
Fastest non-stop we saw: 2h 06m with Alaska Airlines.
| Airline | Non-stop days / priced days | Fastest non-stop |
|---|---|---|
| Alaska Airlines | 47 / 119 | 2h 06m |
Departure days with a non-stop fare checked in the last 14 days. A carrier listed here had a non-stop fare on at least 3 days; schedules may differ.
Airport to city: straight-line distance
- Billings Logan International Airport (BIL) → Billings, city gazetteer reference point (45.7833, -108.5007): ≈ 4 km.
- Portland International Airport (PDX) → Portland, city gazetteer reference point (45.5051, -122.6750): ≈ 11 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 Billings to Portland: February 2027, from €114 (checked 12 Oct 2026).
| Month | Lowest fare | Priced days |
|---|---|---|
| October 2026 | €227 | 19 |
| November 2026 | €128 | 30 |
| December 2026 | €136 | 31 |
| January 2027 | €119 | 29 |
| February 2027 | €114 | 10 |
Lowest fare by day of the week
Cheapest day of the week from Billings to Portland: Wednesday, from €114 (checked 12 Oct 2026).
| Day | Lowest fare | Priced days |
|---|---|---|
| Monday | €140 | 17 |
| Tuesday | €138 | 17 |
| Wednesday | €114 | 18 |
| Thursday | €141 | 17 |
| Friday | €128 | 17 |
| Saturday | €119 | 17 |
| Sunday | €142 | 16 |
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 Billings to Portland by days until departure (61 days or more): €114 (checked 12 Oct 2026).
| Days before departure | Lowest fare | Priced days |
|---|---|---|
| 0 to 7 days | €305 | 8 |
| 8 to 30 days | €138 | 23 |
| 31 to 60 days | €128 | 30 |
| 61 days or more | €114 | 58 |
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 Billings to Portland: Allegiant Air, from €114 (checked 12 Oct 2026).
| Airline | Lowest fare | Priced days |
|---|---|---|
| Allegiant Air | €114Feb 3, 2027 | 17 |
| Alaska Airlines | €119Jan 30, 2027 | 79 |
| United Airlines | €173Nov 14, 2026 | 17 |
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 Billings to Portland?
The lowest fare we have observed is €114, found on 12 Oct 2026. Prices move, so read it as a floor rather than a quote.
When is the cheapest month to fly from Billings to Portland?
Cheapest month from Billings to Portland: February 2027, from €114 (checked 12 Oct 2026).
Are there direct flights from Billings to Portland?
Our data holds no non-stop flight from Billings to Portland. The fares on this page include at least one stop.
Which airlines fly from Billings to Portland?
These are the carriers we have seen on the route: Air Canada, Alaska Airlines, Allegiant Air, Flair Airlines, Frontier Airlines, United Airlines +1 more.
How long does the flight from Billings to Portland take?
The average journey time across the 130 fares we observed is 9h 25m, including any stops. Individual departures vary; the fastest observed flight is listed in the route facts above.
Which airlines had non-stop offers on at least 3 departure dates from Billings to Portland?
For Billings to Portland, examples of observed one-way non-stop offers checked within the last 14 days: Alaska Airlines (47). Each number counts distinct departure dates, not weekly flights; check current availability in search.
Which day of the week is cheapest from Billings to Portland?
Cheapest day of the week from Billings to Portland: Wednesday, from €114 (checked 12 Oct 2026).
Which airline has the lowest fare from Billings to Portland?
Cheapest airline from Billings to Portland: Allegiant Air, from €114 (checked 12 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: 12 Oct 2026