Travel with Axel,
get the best price.

San Juan → Dulles

Jan 21, 2027 · return Feb 4, 2027

SJU → IAD1 adulteconomyRound trip

9 flight options · 4 airlines

Nonstop flights

Thu, Jan 21 – Thu, Feb 4

Frontier Airlines
8:28 amSJU
4h 3m
Nonstop
11:31 amIAD
Frontier Airlines
1:05 pmIAD
3h 47m
Nonstop
5:52 pmSJU

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Thu, Feb 4

United Airlines
8:05 amSJU
4h 4m
Nonstop
11:09 amIAD
United Airlines
8:22 amIAD
3h 53m
Nonstop
1:15 pmSJU

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Thu, Feb 4

United Airlines
5:50 pmSJU
4h 6m
Nonstop
8:56 pmIAD
United Airlines
8:22 amIAD
3h 53m
Nonstop
1:15 pmSJU

Round-trip total · 1 adult · Taxes included

One-stop flights

Thu, Jan 21 – Thu, Feb 4

American Airlines
7:05 amSJU
8h 48m
CLT · 3h 17m
2:53 pmIAD
American Airlines
9:11 amIAD
7h 36m
CLT · 2h 17m
5:47 pmSJU

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Thu, Feb 4

Air Canada
2:25 pmSJU
8h 3m
YYZ · 1h 19m
9:28 pmIAD
United Airlines
8:22 amIAD
3h 53m
Nonstop
1:15 pmSJU

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Thu, Feb 4

Frontier Airlines
8:53 amSJU
4h 17m
Nonstop
12:10 pmIAD
Frontier Airlines
3:41 pmIAD
6h 50m
FLL · 1h 19m
11:31 pmSJU

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Thu, Feb 4

Frontier Airlines
1:57 pmSJU
7h 57m
MIA · 2h 14m
8:54 pmIAD
Frontier Airlines
1:05 pmIAD
3h 47m
Nonstop
5:52 pmSJU

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Thu, Feb 4

Frontier Airlines
3:55 amSJU
7h 26m
MCO · 2h
10:21 amIAD
Frontier Airlines
1:05 pmIAD
3h 47m
Nonstop
5:52 pmSJU

Round-trip total · 1 adult · Taxes included

Thu, Jan 21 – Thu, Feb 4

United Airlines
2:52 pmSJU
7h 38m
EWR · 2h 1m
9:30 pmIAD
United Airlines
8:22 amIAD
3h 53m
Nonstop
1:15 pmSJU

Round-trip total · 1 adult · Taxes included

Make this trip yours

SJU ⇄ IAD

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, Frontier 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)
2027-01-21 → 2027-02-04Frontier AirlinesF91939 / F91940$230.002026-10-29T01:23:44Z
2027-01-21 → 2027-02-04United AirlinesUA2022 / UA2021$445.002026-10-29T01:23:44Z
2027-01-21 → 2027-02-04American AirlinesAA3324 + AA5543 / AA5249 + AA539$405.002026-10-29T01:23:44Z
2027-01-21 → 2027-02-04Air Canada / United AirlinesAC1719 + UA3466 / UA2021$490.002026-10-29T01:23:44Z
2027-01-21 → 2027-02-04United AirlinesUA2024 / UA2021$445.002026-10-29T01:23:44Z
2027-01-21 → 2027-02-04Frontier AirlinesF91939 / F92959 + F94916$242.502026-10-29T01:23:44Z
2027-01-21 → 2027-02-04Frontier AirlinesF92283 + F93732 / F91940$242.502026-10-29T01:23:44Z
2027-01-21 → 2027-02-04Frontier AirlinesF91823 + F94230 / F91940$242.502026-10-29T01:23:44Z
2027-01-21 → 2027-02-04United AirlinesUA1173 + UA2677 / UA2021$427.502026-10-29T01:23:44Z

2027-01-21 → 2027-02-04 · $230.00

  • Frontier Airlines F91939: SJU 2027-01-21 08:28:00 → IAD 2027-01-21 11:31:00; nonstop; 243 minutes. Local airport times.
  • Frontier Airlines F91940: IAD 2027-02-04 13:05:00 → SJU 2027-02-04 17:52:00; nonstop; 227 minutes. Local airport times.

2027-01-21 → 2027-02-04 · $445.00

  • United Airlines UA2022: SJU 2027-01-21 08:05:00 → IAD 2027-01-21 11:09:00; nonstop; 244 minutes. Local airport times.
  • United Airlines UA2021: IAD 2027-02-04 08:22:00 → SJU 2027-02-04 13:15:00; nonstop; 233 minutes. Local airport times.

2027-01-21 → 2027-02-04 · $405.00

  • American Airlines AA3324 / AA5543: SJU 2027-01-21 07:05:00 → IAD 2027-01-21 14:53:00; 1 stop(s) via CLT; 528 minutes. Local airport times.
    • AA3324: SJU 2027-01-21 07:05:00 → CLT 2027-01-21 10:05:00; layover at CLT: 197 minutes.
    • AA5543: CLT 2027-01-21 13:22:00 → IAD 2027-01-21 14:53:00.
  • American Airlines AA5249 / AA539: IAD 2027-02-04 09:11:00 → SJU 2027-02-04 17:47:00; 1 stop(s) via CLT; 456 minutes. Local airport times.
    • AA5249: IAD 2027-02-04 09:11:00 → CLT 2027-02-04 10:51:00; layover at CLT: 137 minutes.
    • AA539: CLT 2027-02-04 13:08:00 → SJU 2027-02-04 17:47:00.

2027-01-21 → 2027-02-04 · $490.00

  • Air Canada AC1719 / UA3466: SJU 2027-01-21 14:25:00 → IAD 2027-01-21 21:28:00; 1 stop(s) via YYZ; 483 minutes. Local airport times.
    • AC1719: SJU 2027-01-21 14:25:00 → YYZ 2027-01-21 18:25:00; layover at YYZ: 79 minutes.
    • UA3466: YYZ 2027-01-21 19:44:00 → IAD 2027-01-21 21:28:00.
  • United Airlines UA2021: IAD 2027-02-04 08:22:00 → SJU 2027-02-04 13:15:00; nonstop; 233 minutes. Local airport times.

2027-01-21 → 2027-02-04 · $445.00

  • United Airlines UA2024: SJU 2027-01-21 17:50:00 → IAD 2027-01-21 20:56:00; nonstop; 246 minutes. Local airport times.
  • United Airlines UA2021: IAD 2027-02-04 08:22:00 → SJU 2027-02-04 13:15:00; nonstop; 233 minutes. Local airport times.

2027-01-21 → 2027-02-04 · $242.50

  • Frontier Airlines F91939: SJU 2027-01-21 08:53:00 → IAD 2027-01-21 12:10:00; nonstop; 257 minutes. Local airport times.
  • Frontier Airlines F92959 / F94916: IAD 2027-02-04 15:41:00 → SJU 2027-02-04 23:31:00; 1 stop(s) via FLL; 410 minutes. Local airport times.
    • F92959: IAD 2027-02-04 15:41:00 → FLL 2027-02-04 18:32:00; layover at FLL: 79 minutes.
    • F94916: FLL 2027-02-04 19:51:00 → SJU 2027-02-04 23:31:00.

2027-01-21 → 2027-02-04 · $242.50

  • Frontier Airlines F92283 / F93732: SJU 2027-01-21 13:57:00 → IAD 2027-01-21 20:54:00; 1 stop(s) via MIA; 477 minutes. Local airport times.
    • F92283: SJU 2027-01-21 13:57:00 → MIA 2027-01-21 15:58:00; layover at MIA: 134 minutes.
    • F93732: MIA 2027-01-21 18:12:00 → IAD 2027-01-21 20:54:00.
  • Frontier Airlines F91940: IAD 2027-02-04 13:05:00 → SJU 2027-02-04 17:52:00; nonstop; 227 minutes. Local airport times.

2027-01-21 → 2027-02-04 · $242.50

  • Frontier Airlines F91823 / F94230: SJU 2027-01-21 03:55:00 → IAD 2027-01-21 10:21:00; 1 stop(s) via MCO; 446 minutes. Local airport times.
    • F91823: SJU 2027-01-21 03:55:00 → MCO 2027-01-21 06:00:00; layover at MCO: 120 minutes.
    • F94230: MCO 2027-01-21 08:00:00 → IAD 2027-01-21 10:21:00.
  • Frontier Airlines F91940: IAD 2027-02-04 13:05:00 → SJU 2027-02-04 17:52:00; nonstop; 227 minutes. Local airport times.

2027-01-21 → 2027-02-04 · $427.50

  • United Airlines UA1173 / UA2677: SJU 2027-01-21 14:52:00 → IAD 2027-01-21 21:30:00; 1 stop(s) via EWR; 458 minutes. Local airport times.
    • UA1173: SJU 2027-01-21 14:52:00 → EWR 2027-01-21 18:10:00; layover at EWR: 121 minutes.
    • UA2677: EWR 2027-01-21 20:11:00 → IAD 2027-01-21 21:30:00.
  • United Airlines UA2021: IAD 2027-02-04 08:22:00 → SJU 2027-02-04 13:15:00; nonstop; 233 minutes. Local airport times.

More dates for this route