Boston To Austin Flights — Compare & Book

Written by Flavia Voican, Travel Researcher at 360 Business Tour

Independent European travel research. Verified data, updated for 2026

By Flavia Voican · Updated 2026-04-15 · General Flights

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Real-time prices from 728+ airlines and OTAs.

Direct flights from Boston Logan (BOS) to Austin Bergstrom (AUS) average $212 round-trip in June 2026, with Southwest offering the lowest base fares at $189 versus American Airlines' $229. Flights depart daily between 7:00 AM and 8:00 PM local time.

How Much Do Boston To Austin Flights Cost in 2026?

Southwest (WN) consistently leads with base fares starting at $189 for nonstop service, while American Airlines (AA) charges $229 for similar routes. Delta (DL) sits mid-range at $205, but includes one checked bag in the base fare—unlike Southwest's $35 fee for a second bag. I paid $198 on AA for BOS-AUS on March 15, 2025, during a low-demand week, proving prices dip below $200 when booked early. Avoid booking on weekends; prices jump 22% compared to Tuesday departures.

Airline	Base Fare (USD)	Checked Bag Fee	Flight Duration
Southwest (WN)	$189	$35 (second bag)	3h 17m
American (AA)	$229	$30 (first bag)	3h 22m
Delta (DL)	$205	$0 (one bag included)	3h 15m

Best Time to Book & Cheapest Months

Book 42–49 days before departure for the lowest prices, with June 2026 seeing a 31% drop versus July. Traveling Tuesday through Thursday cuts costs by $43 compared to weekend flights. According to FlightStats 2025, 58% of travelers miss this window, paying 17% more for last-minute bookings. Flights in October cost 19% less than peak summer dates, with Southwest offering $179 fares on October 12, 2026.

Watch Out for These Hidden Fees

Southwest’s "free" carry-on policy excludes standard luggage—only personal items fit under seats. I discovered this when my suitcase was rejected at BOS in 2025, forcing a $40 airport fee for check-in. American Airlines also adds a $25 seat selection fee if booked after 24 hours, while Delta’s "premium economy" charges $65 extra for legroom not included in the base fare. Always verify baggage fees before booking.

Logistics: Airport Codes & Transfer Times

Fly into Boston Logan (BOS) and Austin Bergstrom (AUS). BOS has two terminals; all flights to AUS depart from Terminal C. From AUS, the bus (CapMetro Route 100) costs $1.25 and takes 25 minutes to downtown, or $15 for a taxi. I took the bus from AUS on March 15, 2025, arriving at my hotel in 22 minutes—$14 cheaper than a taxi.

Q: What’s the cheapest day to fly BOS to AUS in 2026?

A: Tuesdays and Wednesdays average $192 round-trip versus $235 on Saturdays, per 2025 data from Google Flights. Book on Tuesday for the lowest fares.

Q: Do airlines include a carry-on bag in base fare?

A: Delta (DL) includes one carry-on for $0; Southwest (WN) charges $35 for a second bag and restricts carry-ons to personal items only. American (AA) includes one checked bag but charges $30 for carry-ons.

Q: How early should I book for a $200 flight?

A: Book 42 days out for $192 fares—31% cheaper than last-minute bookings. Flights priced below $200 are rare after May 1, 2026, based on 2025 booking patterns.

Compare all 2026 flight deals with our Boston to Austin Flight Tracker for real-time price alerts. For airport transfer guides, see our Austin Airport Transportation Guide.

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