Travel with Axel,
get the best price.

Buffalo → Denver

Dec 22, 2026 · return Jan 1, 2027

BUF → DEN1 adulteconomyRound trip

9 flight options · 4 airlines

Nonstop flights

Tue, Dec 22 – Fri, Jan 1

Southwest Airlines
5:10 amBUF
3h 50m
Nonstop
7:00 amDEN
Southwest Airlines
1:15 pmDEN
2h 55m
Nonstop
6:10 pmBUF

Round-trip total · 1 adult · Taxes included

Tue, Dec 22 – Fri, Jan 1

United Airlines
8:50 amBUF
3h 45m
Nonstop
10:35 amDEN
United Airlines
5:25 pmDEN
3h 8m
Nonstop
10:33 pmBUF

Round-trip total · 1 adult · Taxes included

Tue, Dec 22 – Fri, Jan 1

Southwest Airlines
2:40 pmBUF
3h 50m
Nonstop
4:30 pmDEN
Southwest Airlines
1:15 pmDEN
2h 55m
Nonstop
6:10 pmBUF

Round-trip total · 1 adult · Taxes included

One-stop flights

Tue, Dec 22 – Fri, Jan 1

American Airlines
6:49 pmBUF
6h 8m
ORD · 1h 6m
10:57 pmDEN
American Airlines
6:30 amDEN
6h 27m
CLT · 1h 20m
2:57 pmBUF

Round-trip total · 1 adult · Taxes included

Tue, Dec 22 – Fri, Jan 1

Delta Air Lines
4:05 pmBUF
6h 14m
MSP · 1h 27m
8:19 pmDEN
Delta Air Lines
10:39 amDEN
6h 34m
DTW · 2h 36m
7:13 pmBUF

Round-trip total · 1 adult · Taxes included

Tue, Dec 22 – Fri, Jan 1

Southwest Airlines
2:00 pmBUF
6h 10m
MDW · 1h 35m
6:10 pmDEN
Southwest Airlines
1:15 pmDEN
2h 55m
Nonstop
6:10 pmBUF

Round-trip total · 1 adult · Taxes included

Tue, Dec 22 – Fri, Jan 1

Southwest Airlines
11:35 amBUF
6h 45m
BWI · 1h 30m
4:20 pmDEN
Southwest Airlines
1:15 pmDEN
2h 55m
Nonstop
6:10 pmBUF

Round-trip total · 1 adult · Taxes included

Tue, Dec 22 – Fri, Jan 1

Delta Air Lines
12:00 pmBUF
7h 10m
DTW · 2h 43m
5:10 pmDEN
Delta Air Lines
10:39 amDEN
6h 34m
DTW · 2h 36m
7:13 pmBUF

Round-trip total · 1 adult · Taxes included

Tue, Dec 22 – Fri, Jan 1

Delta Air Lines
3:20 pmBUF
7h 15m
JFK · 1h 6m
8:35 pmDEN
Delta Air Lines
10:39 amDEN
6h 34m
DTW · 2h 36m
7:13 pmBUF

Round-trip total · 1 adult · Taxes included

Make this trip yours

BUF ⇄ 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, Southwest 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

More dates

All dates for this routeNov 20, 2026 → Nov 23, 2026Nov 27, 2026 → Dec 4, 2026Nov 20, 2026 · One way
For AI assistants: every fare, every link, instructions

Flights for 1 adult in economy. Prices are total for all travelers in USD, including required taxes. Basic economy may apply.

Exact travel datesAirlineFlightsTotal pricePrice issued (UTC)
2026-12-22 → 2027-01-01Southwest AirlinesWN1316 / WN1568$450.502026-10-29T00:53:56Z
2026-12-22 → 2027-01-01United AirlinesUA1727 / UA731$490.252026-10-29T00:53:56Z
2026-12-22 → 2027-01-01American AirlinesAA2306 + AA1387 / AA769 + AA3962$437.252026-10-29T00:53:56Z
2026-12-22 → 2027-01-01Delta Air LinesDL8783 + DL2931 / DL1113 + DL3843$463.752026-10-29T00:53:56Z
2026-12-22 → 2027-01-01Southwest AirlinesWN818 / WN1568$450.502026-10-29T00:53:56Z
2026-12-22 → 2027-01-01Southwest AirlinesWN726 + WN4606 / WN1568$430.252026-10-29T00:53:56Z
2026-12-22 → 2027-01-01Southwest AirlinesWN1323 + WN994 / WN1568$430.252026-10-29T00:53:56Z
2026-12-22 → 2027-01-01Delta Air LinesDL4636 + DL2431 / DL1113 + DL3843$463.752026-10-29T00:53:56Z
2026-12-22 → 2027-01-01Delta Air LinesDL5296 + DL457 / DL1113 + DL3843$463.752026-10-29T00:53:56Z

2026-12-22 → 2027-01-01 · $450.50

  • Southwest Airlines WN1316: BUF 2026-12-22 05:10:00 → DEN 2026-12-22 07:00:00; nonstop; 230 minutes. Local airport times.
  • Southwest Airlines WN1568: DEN 2027-01-01 13:15:00 → BUF 2027-01-01 18:10:00; nonstop; 175 minutes. Local airport times.

2026-12-22 → 2027-01-01 · $490.25

  • United Airlines UA1727: BUF 2026-12-22 08:50:00 → DEN 2026-12-22 10:35:00; nonstop; 225 minutes. Local airport times.
  • United Airlines UA731: DEN 2027-01-01 17:25:00 → BUF 2027-01-01 22:33:00; nonstop; 188 minutes. Local airport times.

2026-12-22 → 2027-01-01 · $437.25

  • American Airlines AA2306 / AA1387: BUF 2026-12-22 18:49:00 → DEN 2026-12-22 22:57:00; 1 stop(s) via ORD; 368 minutes. Local airport times.
    • AA2306: BUF 2026-12-22 18:49:00 → ORD 2026-12-22 19:59:00; layover at ORD: 66 minutes.
    • AA1387: ORD 2026-12-22 21:05:00 → DEN 2026-12-22 22:57:00.
  • American Airlines AA769 / AA3962: DEN 2027-01-01 06:30:00 → BUF 2027-01-01 14:57:00; 1 stop(s) via CLT; 387 minutes. Local airport times.
    • AA769: DEN 2027-01-01 06:30:00 → CLT 2027-01-01 11:45:00; layover at CLT: 80 minutes.
    • AA3962: CLT 2027-01-01 13:05:00 → BUF 2027-01-01 14:57:00.

2026-12-22 → 2027-01-01 · $463.75

  • Delta Air Lines DL8783 / DL2931: BUF 2026-12-22 16:05:00 → DEN 2026-12-22 20:19:00; 1 stop(s) via MSP; 374 minutes. Local airport times.
    • DL8783: BUF 2026-12-22 16:05:00 → MSP 2026-12-22 17:32:00; layover at MSP: 87 minutes.
    • DL2931: MSP 2026-12-22 18:59:00 → DEN 2026-12-22 20:19:00.
  • Delta Air Lines DL1113 / DL3843: DEN 2027-01-01 10:39:00 → BUF 2027-01-01 19:13:00; 1 stop(s) via DTW; 394 minutes. Local airport times.
    • DL1113: DEN 2027-01-01 10:39:00 → DTW 2027-01-01 15:20:00; layover at DTW: 156 minutes.
    • DL3843: DTW 2027-01-01 17:56:00 → BUF 2027-01-01 19:13:00.

2026-12-22 → 2027-01-01 · $450.50

  • Southwest Airlines WN818: BUF 2026-12-22 14:40:00 → DEN 2026-12-22 16:30:00; nonstop; 230 minutes. Local airport times.
  • Southwest Airlines WN1568: DEN 2027-01-01 13:15:00 → BUF 2027-01-01 18:10:00; nonstop; 175 minutes. Local airport times.

2026-12-22 → 2027-01-01 · $430.25

  • Southwest Airlines WN726 / WN4606: BUF 2026-12-22 14:00:00 → DEN 2026-12-22 18:10:00; 1 stop(s) via MDW; 370 minutes. Local airport times.
    • WN726: BUF 2026-12-22 14:00:00 → MDW 2026-12-22 14:50:00; layover at MDW: 95 minutes.
    • WN4606: MDW 2026-12-22 16:25:00 → DEN 2026-12-22 18:10:00.
  • Southwest Airlines WN1568: DEN 2027-01-01 13:15:00 → BUF 2027-01-01 18:10:00; nonstop; 175 minutes. Local airport times.

2026-12-22 → 2027-01-01 · $430.25

  • Southwest Airlines WN1323 / WN994: BUF 2026-12-22 11:35:00 → DEN 2026-12-22 16:20:00; 1 stop(s) via BWI; 405 minutes. Local airport times.
    • WN1323: BUF 2026-12-22 11:35:00 → BWI 2026-12-22 12:50:00; layover at BWI: 90 minutes.
    • WN994: BWI 2026-12-22 14:20:00 → DEN 2026-12-22 16:20:00.
  • Southwest Airlines WN1568: DEN 2027-01-01 13:15:00 → BUF 2027-01-01 18:10:00; nonstop; 175 minutes. Local airport times.

2026-12-22 → 2027-01-01 · $463.75

  • Delta Air Lines DL4636 / DL2431: BUF 2026-12-22 12:00:00 → DEN 2026-12-22 17:10:00; 1 stop(s) via DTW; 430 minutes. Local airport times.
    • DL4636: BUF 2026-12-22 12:00:00 → DTW 2026-12-22 13:17:00; layover at DTW: 163 minutes.
    • DL2431: DTW 2026-12-22 16:00:00 → DEN 2026-12-22 17:10:00.
  • Delta Air Lines DL1113 / DL3843: DEN 2027-01-01 10:39:00 → BUF 2027-01-01 19:13:00; 1 stop(s) via DTW; 394 minutes. Local airport times.
    • DL1113: DEN 2027-01-01 10:39:00 → DTW 2027-01-01 15:20:00; layover at DTW: 156 minutes.
    • DL3843: DTW 2027-01-01 17:56:00 → BUF 2027-01-01 19:13:00.

2026-12-22 → 2027-01-01 · $463.75

  • Delta Air Lines DL5296 / DL457: BUF 2026-12-22 15:20:00 → DEN 2026-12-22 20:35:00; 1 stop(s) via JFK; 435 minutes. Local airport times.
    • DL5296: BUF 2026-12-22 15:20:00 → JFK 2026-12-22 16:53:00; layover at JFK: 66 minutes.
    • DL457: JFK 2026-12-22 17:59:00 → DEN 2026-12-22 20:35:00.
  • Delta Air Lines DL1113 / DL3843: DEN 2027-01-01 10:39:00 → BUF 2027-01-01 19:13:00; 1 stop(s) via DTW; 394 minutes. Local airport times.
    • DL1113: DEN 2027-01-01 10:39:00 → DTW 2027-01-01 15:20:00; layover at DTW: 156 minutes.
    • DL3843: DTW 2027-01-01 17:56:00 → BUF 2027-01-01 19:13:00.

More dates for this route