Travel with Axel, get the best price.

Route overview: Billings to Denver (DEN) flight deals

Billings (BIL) to Denver (DEN), Dec 18–20, 2026, return Dec 25–27, 2026: from $357 round trip

Billings (BIL) to Denver (DEN), Dec 18–20, 2026, return Dec 25–27, 2026: from $357 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $357 round trip, Axel-exclusive, United Airlines, nonstop, Dec 18–25, 2026, 1 adult, economy, checked Oct 29, 2026.

BIL → DEN1 adulteconomyRound trip

27 flight options · 2 airlines

Nonstop flights

Fri, Dec 18 – Sun, Dec 27

United Airlines
7:00 amBIL
1h 46m
Nonstop
8:46 amDEN
United Airlines
8:15 amDEN
1h 47m
Nonstop
10:02 amBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 – Fri, Dec 25

United Airlines
7:00 amBIL
1h 46m
Nonstop
8:46 amDEN
United Airlines
11:45 amDEN
1h 39m
Nonstop
1:24 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Sat, Dec 26

United Airlines
7:00 amBIL
1h 41m
Nonstop
8:41 amDEN
United Airlines
7:35 pmDEN
1h 40m
Nonstop
9:15 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Sun, Dec 27

United Airlines
4:04 pmBIL
1h 52m
Nonstop
5:56 pmDEN
United Airlines
8:15 amDEN
1h 47m
Nonstop
10:02 amBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Sun, Dec 27

United Airlines
4:15 pmBIL
2h
Nonstop
6:15 pmDEN
United Airlines
8:15 amDEN
1h 47m
Nonstop
10:02 amBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Sat, Dec 26

United Airlines
4:15 pmBIL
2h
Nonstop
6:15 pmDEN
United Airlines
7:35 pmDEN
1h 40m
Nonstop
9:15 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Fri, Dec 25

United Airlines
4:15 pmBIL
2h
Nonstop
6:15 pmDEN
United Airlines
11:45 amDEN
1h 39m
Nonstop
1:24 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Fri, Dec 25

United Airlines
4:04 pmBIL
1h 52m
Nonstop
5:56 pmDEN
United Airlines
11:45 amDEN
1h 39m
Nonstop
1:24 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 – Sat, Dec 26

United Airlines
7:00 amBIL
1h 46m
Nonstop
8:46 amDEN
United Airlines
7:35 pmDEN
1h 40m
Nonstop
9:15 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 – Fri, Dec 25

United Airlines
4:15 pmBIL
2h
Nonstop
6:15 pmDEN
United Airlines
11:45 amDEN
1h 39m
Nonstop
1:24 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 – Sun, Dec 27

United Airlines
4:15 pmBIL
2h
Nonstop
6:15 pmDEN
United Airlines
8:15 amDEN
1h 47m
Nonstop
10:02 amBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 – Sat, Dec 26

United Airlines
4:15 pmBIL
2h
Nonstop
6:15 pmDEN
United Airlines
7:35 pmDEN
1h 40m
Nonstop
9:15 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Sun, Dec 27

United Airlines
7:00 amBIL
1h 46m
Nonstop
8:46 amDEN
United Airlines
8:15 amDEN
1h 47m
Nonstop
10:02 amBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Sat, Dec 26

United Airlines
4:04 pmBIL
1h 52m
Nonstop
5:56 pmDEN
United Airlines
7:35 pmDEN
1h 40m
Nonstop
9:15 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Sat, Dec 26

United Airlines
7:00 amBIL
1h 46m
Nonstop
8:46 amDEN
United Airlines
7:35 pmDEN
1h 40m
Nonstop
9:15 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Fri, Dec 25

United Airlines
7:00 amBIL
1h 41m
Nonstop
8:41 amDEN
United Airlines
11:45 amDEN
1h 39m
Nonstop
1:24 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Fri, Dec 25

United Airlines
7:00 amBIL
1h 46m
Nonstop
8:46 amDEN
United Airlines
11:45 amDEN
1h 39m
Nonstop
1:24 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Sun, Dec 27

United Airlines
7:00 amBIL
1h 41m
Nonstop
8:41 amDEN
United Airlines
8:15 amDEN
1h 47m
Nonstop
10:02 amBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

One-stop flights

Fri, Dec 18 – Sat, Dec 26

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 – Fri, Dec 25

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Fri, Dec 18 – Sun, Dec 27

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Sun, Dec 27

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Sat, Dec 26

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Sat, Dec 26

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Sun, Dec 27

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sat, Dec 19 – Fri, Dec 25

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Sun, Dec 20 – Fri, Dec 25

Delta Air Lines
5:35 amBIL
4h 8m
SLC · 1h 1m
9:43 amDEN
Delta Air Lines
12:29 pmDEN
5h 12m
SLC · 2h 6m
5:41 pmBIL

Round-trip total · 1 adult · Taxes included

Availability is checked when you select these flights.

Hotels for these nights (Dec 18–25, 2026 · 7 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $624 · 4★ DoubleTree by Hilton Denver Cherry Creek $570 · 5★ Four Seasons Denver Hotel $3,649

Hotels for these nights (Dec 18–26, 2026 · 8 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $710 · 4★ DoubleTree by Hilton Denver Cherry Creek $654 · 5★ Four Seasons Denver Hotel $4,174

Hotels for these nights (Dec 18–27, 2026 · 9 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $795 · 4★ DoubleTree by Hilton Denver Cherry Creek $740 · 5★ Four Seasons Denver Hotel $4,665

Hotels for these nights (Dec 19–25, 2026 · 6 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $539 · 4★ DoubleTree by Hilton Denver Cherry Creek $491 · 5★ Four Seasons Denver Hotel $3,078

Hotels for these nights (Dec 19–26, 2026 · 7 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $625 · 4★ DoubleTree by Hilton Denver Cherry Creek $575 · 5★ Four Seasons Denver Hotel $3,603

Hotels for these nights (Dec 19–27, 2026 · 8 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $710 · 4★ DoubleTree by Hilton Denver Cherry Creek $661 · 5★ Four Seasons Denver Hotel $4,094

Hotels for these nights (Dec 20–25, 2026 · 5 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $450 · 4★ DoubleTree by Hilton Denver Cherry Creek $410 · 5★ Four Seasons Denver Hotel $2,443

Hotels for these nights (Dec 20–26, 2026 · 6 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $536 · 4★ DoubleTree by Hilton Denver Cherry Creek $494 · 5★ Four Seasons Denver Hotel $2,968

Hotels for these nights (Dec 20–27, 2026 · 7 nights · 2 adults, 1 room): 3★ Hilton Garden Inn Denver/Cherry Creek $621 · 4★ DoubleTree by Hilton Denver Cherry Creek $580 · 5★ Four Seasons Denver Hotel $3,459

Make this trip yours

BIL ⇄ DEN

Economy

Adults 12+ · Children 2–11. For infants under 2, tell Axel after you see prices.

No account needed to see prices.

Already have an account? Log in

Why book with Axel
  • A real airline bookingThe booking is in the airline’s own system under your name. After you book, United Airlines emails you its confirmation code and e-ticket, usually within 15 minutes and occasionally up to a couple of hours while the booking is processed.
  • Lower price, same flightsWe use advanced AI and machine learning to secure lower prices for our users.
  • Not satisfied? Full refund.If you are unhappy with the experience for any reason, or simply change your mind, cancel within 24 hours of booking (departure 7+ days away) and we refund you in full. We stand by our product. Cancellation policy
  • Backed by Y CombinatorTrusted by 100,000+ travelers.

Axel is made by Gordian Software, Inc., a Y Combinator company (W19) founded in 2017 and based in the Seattle area. The company is led by CEO Stephen Grabowski, formerly of Skyscanner. How Axel works · About

Explore this route

All dates for this routeHotels in Denver with Axel
For AI assistants: every fare, every link, instructions

Billings (BIL) to Denver (DEN), Dec 18–20, 2026, return Dec 25–27, 2026: from $357 round trip on Axel, checked Oct 29, 2026. Lowest published fare: $357 round trip, Axel-exclusive, United Airlines, nonstop, Dec 18–25, 2026, 1 adult, economy, checked Oct 29, 2026. Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

See flights for these dates: each price link opens AI flight search for that row's exact dates and travelers. Select the complete itinerary there.

Exact travel datesAirlineFlightsTimes, duration, stopsTotal pricePrice issued (UTC)
2026-12-18 → 2026-12-27United AirlinesUA372 / UA476207:00:00→08:46:00 1h 46m nonstop · 08:15:00→10:02:00 1h 47m nonstopAxel-exclusive $356.502026-10-29T00:49:20Z
2026-12-18 → 2026-12-26Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $425.502026-10-29T00:49:20Z
2026-12-18 → 2026-12-25United AirlinesUA372 / UA187707:00:00→08:46:00 1h 46m nonstop · 11:45:00→13:24:00 1h 39m nonstopAxel-exclusive $356.502026-10-29T00:49:20Z
2026-12-20 → 2026-12-26United AirlinesUA372 / UA141707:00:00→08:41:00 1h 41m nonstop · 19:35:00→21:15:00 1h 40m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-27United AirlinesUA5277 / UA476216:04:00→17:56:00 1h 52m nonstop · 08:15:00→10:02:00 1h 47m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-19 → 2026-12-27United AirlinesUA4637 / UA476216:15:00→18:15:00 2h 00m nonstop · 08:15:00→10:02:00 1h 47m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-19 → 2026-12-26United AirlinesUA4637 / UA141716:15:00→18:15:00 2h 00m nonstop · 19:35:00→21:15:00 1h 40m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-19 → 2026-12-25United AirlinesUA4637 / UA187716:15:00→18:15:00 2h 00m nonstop · 11:45:00→13:24:00 1h 39m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-25United AirlinesUA5277 / UA187716:04:00→17:56:00 1h 52m nonstop · 11:45:00→13:24:00 1h 39m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-18 → 2026-12-26United AirlinesUA372 / UA141707:00:00→08:46:00 1h 46m nonstop · 19:35:00→21:15:00 1h 40m nonstopAxel-exclusive $356.502026-10-29T00:49:20Z
2026-12-18 → 2026-12-25United AirlinesUA4637 / UA187716:15:00→18:15:00 2h 00m nonstop · 11:45:00→13:24:00 1h 39m nonstopAxel-exclusive $356.502026-10-29T00:49:20Z
2026-12-18 → 2026-12-27United AirlinesUA4637 / UA476216:15:00→18:15:00 2h 00m nonstop · 08:15:00→10:02:00 1h 47m nonstopAxel-exclusive $356.502026-10-29T00:49:20Z
2026-12-18 → 2026-12-26United AirlinesUA4637 / UA141716:15:00→18:15:00 2h 00m nonstop · 19:35:00→21:15:00 1h 40m nonstopAxel-exclusive $356.502026-10-29T00:49:20Z
2026-12-19 → 2026-12-27United AirlinesUA372 / UA476207:00:00→08:46:00 1h 46m nonstop · 08:15:00→10:02:00 1h 47m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-26United AirlinesUA5277 / UA141716:04:00→17:56:00 1h 52m nonstop · 19:35:00→21:15:00 1h 40m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-19 → 2026-12-26United AirlinesUA372 / UA141707:00:00→08:46:00 1h 46m nonstop · 19:35:00→21:15:00 1h 40m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-25United AirlinesUA372 / UA187707:00:00→08:41:00 1h 41m nonstop · 11:45:00→13:24:00 1h 39m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-19 → 2026-12-25United AirlinesUA372 / UA187707:00:00→08:46:00 1h 46m nonstop · 11:45:00→13:24:00 1h 39m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-27United AirlinesUA372 / UA476207:00:00→08:41:00 1h 41m nonstop · 08:15:00→10:02:00 1h 47m nonstopAxel-exclusive $403.002026-10-29T00:49:20Z
2026-12-18 → 2026-12-25Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $425.502026-10-29T00:49:20Z
2026-12-18 → 2026-12-27Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $425.502026-10-29T00:49:20Z
2026-12-19 → 2026-12-27Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $481.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-26Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $481.002026-10-29T00:49:20Z
2026-12-19 → 2026-12-26Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $481.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-27Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $481.002026-10-29T00:49:20Z
2026-12-19 → 2026-12-25Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $481.002026-10-29T00:49:20Z
2026-12-20 → 2026-12-25Delta Air LinesDL1360 + DL1317 / DL1553 + DL382805:35:00→09:43:00 4h 08m 1 stop via SLC · 12:29:00→17:41:00 5h 12m 1 stop via SLCAxel-exclusive $481.002026-10-29T00:49:20Z

Hotels in Denver for these trips

Hotels: under a trip, hotels in Denver for exactly those nights link to the hotel pages for 2 adults in 1 room. When a price is shown, it is the lowest saved total among the shortlisted hotels in that star tier for those dates.

All hotels in Denver

Route overview: Billings to Denver (DEN) flight deals

2026-12-18 → 2026-12-27 · Axel-exclusive $356.50

  • United Airlines UA372: BIL 2026-12-18 07:00:00 → DEN 2026-12-18 08:46:00; nonstop; 106 minutes. Local airport times.
  • United Airlines UA4762: DEN 2026-12-27 08:15:00 → BIL 2026-12-27 10:02:00; nonstop; 107 minutes. Local airport times.

2026-12-18 → 2026-12-26 · Axel-exclusive $425.50

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-18 05:35:00 → DEN 2026-12-18 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-18 05:35:00 → SLC 2026-12-18 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-18 08:00:00 → DEN 2026-12-18 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-26 12:29:00 → BIL 2026-12-26 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-26 12:29:00 → SLC 2026-12-26 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-26 16:12:00 → BIL 2026-12-26 17:41:00.

2026-12-18 → 2026-12-25 · Axel-exclusive $356.50

  • United Airlines UA372: BIL 2026-12-18 07:00:00 → DEN 2026-12-18 08:46:00; nonstop; 106 minutes. Local airport times.
  • United Airlines UA1877: DEN 2026-12-25 11:45:00 → BIL 2026-12-25 13:24:00; nonstop; 99 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $403.00

  • United Airlines UA372: BIL 2026-12-20 07:00:00 → DEN 2026-12-20 08:41:00; nonstop; 101 minutes. Local airport times.
  • United Airlines UA1417: DEN 2026-12-26 19:35:00 → BIL 2026-12-26 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-20 → 2026-12-27 · Axel-exclusive $403.00

  • United Airlines UA5277: BIL 2026-12-20 16:04:00 → DEN 2026-12-20 17:56:00; nonstop; 112 minutes. Local airport times.
  • United Airlines UA4762: DEN 2026-12-27 08:15:00 → BIL 2026-12-27 10:02:00; nonstop; 107 minutes. Local airport times.

2026-12-19 → 2026-12-27 · Axel-exclusive $403.00

  • United Airlines UA4637: BIL 2026-12-19 16:15:00 → DEN 2026-12-19 18:15:00; nonstop; 120 minutes. Local airport times.
  • United Airlines UA4762: DEN 2026-12-27 08:15:00 → BIL 2026-12-27 10:02:00; nonstop; 107 minutes. Local airport times.

2026-12-19 → 2026-12-26 · Axel-exclusive $403.00

  • United Airlines UA4637: BIL 2026-12-19 16:15:00 → DEN 2026-12-19 18:15:00; nonstop; 120 minutes. Local airport times.
  • United Airlines UA1417: DEN 2026-12-26 19:35:00 → BIL 2026-12-26 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-19 → 2026-12-25 · Axel-exclusive $403.00

  • United Airlines UA4637: BIL 2026-12-19 16:15:00 → DEN 2026-12-19 18:15:00; nonstop; 120 minutes. Local airport times.
  • United Airlines UA1877: DEN 2026-12-25 11:45:00 → BIL 2026-12-25 13:24:00; nonstop; 99 minutes. Local airport times.

2026-12-20 → 2026-12-25 · Axel-exclusive $403.00

  • United Airlines UA5277: BIL 2026-12-20 16:04:00 → DEN 2026-12-20 17:56:00; nonstop; 112 minutes. Local airport times.
  • United Airlines UA1877: DEN 2026-12-25 11:45:00 → BIL 2026-12-25 13:24:00; nonstop; 99 minutes. Local airport times.

2026-12-18 → 2026-12-26 · Axel-exclusive $356.50

  • United Airlines UA372: BIL 2026-12-18 07:00:00 → DEN 2026-12-18 08:46:00; nonstop; 106 minutes. Local airport times.
  • United Airlines UA1417: DEN 2026-12-26 19:35:00 → BIL 2026-12-26 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-18 → 2026-12-25 · Axel-exclusive $356.50

  • United Airlines UA4637: BIL 2026-12-18 16:15:00 → DEN 2026-12-18 18:15:00; nonstop; 120 minutes. Local airport times.
  • United Airlines UA1877: DEN 2026-12-25 11:45:00 → BIL 2026-12-25 13:24:00; nonstop; 99 minutes. Local airport times.

2026-12-18 → 2026-12-27 · Axel-exclusive $356.50

  • United Airlines UA4637: BIL 2026-12-18 16:15:00 → DEN 2026-12-18 18:15:00; nonstop; 120 minutes. Local airport times.
  • United Airlines UA4762: DEN 2026-12-27 08:15:00 → BIL 2026-12-27 10:02:00; nonstop; 107 minutes. Local airport times.

2026-12-18 → 2026-12-26 · Axel-exclusive $356.50

  • United Airlines UA4637: BIL 2026-12-18 16:15:00 → DEN 2026-12-18 18:15:00; nonstop; 120 minutes. Local airport times.
  • United Airlines UA1417: DEN 2026-12-26 19:35:00 → BIL 2026-12-26 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-19 → 2026-12-27 · Axel-exclusive $403.00

  • United Airlines UA372: BIL 2026-12-19 07:00:00 → DEN 2026-12-19 08:46:00; nonstop; 106 minutes. Local airport times.
  • United Airlines UA4762: DEN 2026-12-27 08:15:00 → BIL 2026-12-27 10:02:00; nonstop; 107 minutes. Local airport times.

2026-12-20 → 2026-12-26 · Axel-exclusive $403.00

  • United Airlines UA5277: BIL 2026-12-20 16:04:00 → DEN 2026-12-20 17:56:00; nonstop; 112 minutes. Local airport times.
  • United Airlines UA1417: DEN 2026-12-26 19:35:00 → BIL 2026-12-26 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-19 → 2026-12-26 · Axel-exclusive $403.00

  • United Airlines UA372: BIL 2026-12-19 07:00:00 → DEN 2026-12-19 08:46:00; nonstop; 106 minutes. Local airport times.
  • United Airlines UA1417: DEN 2026-12-26 19:35:00 → BIL 2026-12-26 21:15:00; nonstop; 100 minutes. Local airport times.

2026-12-20 → 2026-12-25 · Axel-exclusive $403.00

  • United Airlines UA372: BIL 2026-12-20 07:00:00 → DEN 2026-12-20 08:41:00; nonstop; 101 minutes. Local airport times.
  • United Airlines UA1877: DEN 2026-12-25 11:45:00 → BIL 2026-12-25 13:24:00; nonstop; 99 minutes. Local airport times.

2026-12-19 → 2026-12-25 · Axel-exclusive $403.00

  • United Airlines UA372: BIL 2026-12-19 07:00:00 → DEN 2026-12-19 08:46:00; nonstop; 106 minutes. Local airport times.
  • United Airlines UA1877: DEN 2026-12-25 11:45:00 → BIL 2026-12-25 13:24:00; nonstop; 99 minutes. Local airport times.

2026-12-20 → 2026-12-27 · Axel-exclusive $403.00

  • United Airlines UA372: BIL 2026-12-20 07:00:00 → DEN 2026-12-20 08:41:00; nonstop; 101 minutes. Local airport times.
  • United Airlines UA4762: DEN 2026-12-27 08:15:00 → BIL 2026-12-27 10:02:00; nonstop; 107 minutes. Local airport times.

2026-12-18 → 2026-12-25 · Axel-exclusive $425.50

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-18 05:35:00 → DEN 2026-12-18 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-18 05:35:00 → SLC 2026-12-18 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-18 08:00:00 → DEN 2026-12-18 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-25 12:29:00 → BIL 2026-12-25 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-25 12:29:00 → SLC 2026-12-25 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-25 16:12:00 → BIL 2026-12-25 17:41:00.

2026-12-18 → 2026-12-27 · Axel-exclusive $425.50

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-18 05:35:00 → DEN 2026-12-18 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-18 05:35:00 → SLC 2026-12-18 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-18 08:00:00 → DEN 2026-12-18 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-27 12:29:00 → BIL 2026-12-27 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-27 12:29:00 → SLC 2026-12-27 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-27 16:12:00 → BIL 2026-12-27 17:41:00.

2026-12-19 → 2026-12-27 · Axel-exclusive $481.00

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-19 05:35:00 → DEN 2026-12-19 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-19 05:35:00 → SLC 2026-12-19 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-19 08:00:00 → DEN 2026-12-19 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-27 12:29:00 → BIL 2026-12-27 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-27 12:29:00 → SLC 2026-12-27 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-27 16:12:00 → BIL 2026-12-27 17:41:00.

2026-12-20 → 2026-12-26 · Axel-exclusive $481.00

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-20 05:35:00 → DEN 2026-12-20 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-20 05:35:00 → SLC 2026-12-20 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-20 08:00:00 → DEN 2026-12-20 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-26 12:29:00 → BIL 2026-12-26 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-26 12:29:00 → SLC 2026-12-26 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-26 16:12:00 → BIL 2026-12-26 17:41:00.

2026-12-19 → 2026-12-26 · Axel-exclusive $481.00

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-19 05:35:00 → DEN 2026-12-19 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-19 05:35:00 → SLC 2026-12-19 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-19 08:00:00 → DEN 2026-12-19 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-26 12:29:00 → BIL 2026-12-26 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-26 12:29:00 → SLC 2026-12-26 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-26 16:12:00 → BIL 2026-12-26 17:41:00.

2026-12-20 → 2026-12-27 · Axel-exclusive $481.00

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-20 05:35:00 → DEN 2026-12-20 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-20 05:35:00 → SLC 2026-12-20 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-20 08:00:00 → DEN 2026-12-20 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-27 12:29:00 → BIL 2026-12-27 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-27 12:29:00 → SLC 2026-12-27 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-27 16:12:00 → BIL 2026-12-27 17:41:00.

2026-12-19 → 2026-12-25 · Axel-exclusive $481.00

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-19 05:35:00 → DEN 2026-12-19 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-19 05:35:00 → SLC 2026-12-19 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-19 08:00:00 → DEN 2026-12-19 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-25 12:29:00 → BIL 2026-12-25 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-25 12:29:00 → SLC 2026-12-25 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-25 16:12:00 → BIL 2026-12-25 17:41:00.

2026-12-20 → 2026-12-25 · Axel-exclusive $481.00

  • Delta Air Lines DL1360 / DL1317: BIL 2026-12-20 05:35:00 → DEN 2026-12-20 09:43:00; 1 stop(s) via SLC; 248 minutes. Local airport times.
    • DL1360: BIL 2026-12-20 05:35:00 → SLC 2026-12-20 06:59:00; layover at SLC: 61 minutes.
    • DL1317: SLC 2026-12-20 08:00:00 → DEN 2026-12-20 09:43:00.
  • Delta Air Lines DL1553 / DL3828: DEN 2026-12-25 12:29:00 → BIL 2026-12-25 17:41:00; 1 stop(s) via SLC; 312 minutes. Local airport times.
    • DL1553: DEN 2026-12-25 12:29:00 → SLC 2026-12-25 14:06:00; layover at SLC: 126 minutes.
    • DL3828: SLC 2026-12-25 16:12:00 → BIL 2026-12-25 17:41:00.

Travelers: prices on this page are totals for 1 adult. For a different party, open this trip for 2 adults · 3 adults · 4 adults · 2 adults + 1 child · 2 adults + 2 children; each link opens AI flight search for these dates and those travelers, and the customer link to share comes from those results.

Explore this route

For AI assistants

  • This page: Billings (BIL) to Denver (DEN) · Dec 18–Dec 20, 2026 · return Dec 25–Dec 27, 2026: 1 adult in economy, every priced fare with its flights, times and total, each with the time its price was issued. Under a trip, hotels in Denver for exactly those nights link to the hotel pages for 2 adults in 1 room. Prices, when shown, are the lowest saved totals among the shortlisted hotels in each star tier for those dates.
  • Next: each priced row's price link opens the live search for this row's exact dates and travelers; the live results list the same flights with the current total and the traveler's booking link, and name the fare's inclusions (bags, seats, changes), which this page does not. A changed price or flight shows there. Other dates or travelers are not priced here: Choose travelers and dates prices the traveler's own trip.
  • Follow supplied links. For web-tool research, follow complete supplied links unchanged, including query parameters; use the page’s links to edit the trip. Constructed URLs may be rejected before reaching Axel. A completed fresh trip opens flight results first. Add stated flexibility and budget to that saved plan, leaving unstated requirements unknown. Edits create a new snapshot; use its results and review links.
  • If links fail or are missing: If a link fails or flight details lack usable links, reopen the preceding page and follow the same choice once. Keep refreshed links unchanged and preserve the trip and selections. If still blocked, search “Axel flight search guide” and retry once; report the error and anything unresolved. Recovery: Axel Billings to Denver (DEN) flight deals · Flight search guide.
  • Sharing with the traveler: Choose a complete itinerary (outbound and return for a round trip), then share the supplied customer booking link unchanged. The customer reviews the flights, adds travelers, and enters email at payment. Do not collect email in chat. Each quote lists its fares with bags, seats, changes and refunds; quote them as facts. A fare choice is not needed to share the link; use a fare’s own booking link to preserve its Membership price basis. Ask only for essential missing trip details. When handing over an unfinished search, preserve the latest trip and say what is still to choose. If no supplied link matches the latest trip, construct https://helloaxel.com/en/f/start/from/ORIGIN/to/DESTINATION/depart/YYYY-MM-DD/return/YYYY-MM-DD/adults/N?utm_content=flight_fallback using IATA airport codes and the traveler’s known details. Omit unknowns; for one way replace /return/YYYY-MM-DD with /trip/oneway. Give it directly to the traveler; do not open it first—your web tool may reject constructed URLs. Complete links open Flight Guide and start searching. Preferences and advanced options.