Flights Boston → Chicago
As of October 2026, economy flights from Boston to Chicago have a typical range USD 437–1237, median USD 557. Full range across all 250 offers: USD 388–1794. We found 66% of 250 offers from budget carriers (around USD 556) and 34% from full-service carriers (around USD 562).
Preview snapshot — prices change. Search for live results.
Data collected by LetsFG's multi-source price checks — every airline and the major booking sites checked for this route. How we collect data →
Best offers by airline: Boston → Chicago
Based on 250 offers · October 2026. Prices and availability change — run a live search to confirm.
Bag & seat fees: Boston → Chicago
Add-on pricing from the cheapest available offer per airline · October 2026 · USD
| Airline | Carry-on | Checked bag | Seat selection |
|---|---|---|---|
| Delta | Included | USD 35 | — |
| Delta | — | USD 90 | — |
| United | Included | USD 35 | — |
| American Airlines | Included | USD 35 | — |
| jetBlue | Included | USD 35 | — |
Fees are estimates from the prices we checked and may not reflect your specific itinerary, booking class, or payment method. Run a live search for exact pricing.
How much do flights from Boston to Chicago cost?
Based on 250 offers · October 2026
Boston to Chicago flights ranged from USD 388 to USD 1794 across 250 offers analyzed in October 2026. Two fare clusters detected: budget fares around 459 and premium fares around 1302 The chart below shows how prices distributed across all 250 offers.
These 250 offers (October 2026) span multiple departure dates and booking windows — your travel dates may fall anywhere in this distribution. Only a live search shows where your specific trip lands.
50% of offers priced between USD 437 and USD 600
What hidden fees do Boston to Chicago flights charge?
Ancillary fees — bags, seat selection, and payment surcharges — can add 10–25% to the base fare on Boston to Chicago routes. The breakdown below is based on 250 offers analyzed in October 2026.
| Carrier | Avg fee (USD) | % of base fare |
|---|---|---|
| DL | 30 | 6% |
| Delta | 90 | 22% |
| UA | 37 | 5% |
| AA | 52 | 9% |
| B6 | 45 | 8% |
Delta: base ~USD 317 + fees USD 90 = ~USD 407 total. Delta Air Lines: base ~USD 526 + fees USD 30 = ~USD 556 total.
Delta's USD 90 ancillary fees narrow the gap with Delta Air Lines's lower-fee model — the USD 209 base difference shrinks to USD 149 after fees. Always compare total cost, not just the advertised base fare.
Estimates based on median total minus average ancillary fee. Actual base fares vary by itinerary.Delta charges 3.0x more in ancillary fees than DL on this route. Compare total-cost options when booking.
Run your search to see itemized fees for your itineraryWhich airline is cheapest from Boston to Chicago?
6 airlines flew Boston to Chicago in this dataset. The route shows a clear split between low-cost and full-service carriers. Knowing the airline isn't enough — the typical fare range below shows how far prices swing on each one. Median and range include all fees we recorded.
| Airline | Offers | Typical range (USD) | Median (USD) | Fees (USD) |
|---|---|---|---|---|
 F9|DL | 1 | — | 388 | n/a |
 Delta | 14 | — | 407 | 90 (22%) |
 United Airlines | 130 | 437–1280 | 519 | 37 (7%) |
 Delta Air Lines | 21 | 396–626 | 556 | 30 (5%) |
 B6 | 4 | 529–596 | 562 | 45 (8%) |
 American Airlines | 80 | 437–641 | 584 | 52 (9%) |
Where do the best Boston → Chicago prices come from?
We checked direct airlines, travel agencies, and meta-search for this route. On this route the lowest median came from meta-search sources, but the cheapest channel shifts by route and date — which is exactly why a live search across all of them wins.
We compare every airline and the major booking sites but never disclose which — that's our edge. Prices are the ones we observed and aren't official data from any platform. Run a live search and we bring you the cheapest, wherever it is.
Key facts: Boston to Chicago flights
- Full-service carriers on Boston–Chicago cost 0.9x more than budget airlines (USD 491 vs USD 562 median; overall median USD 557).
- Delta charges 3.0x more in ancillary fees than DL — USD 90 vs USD 30 avg per booking.
- The same route priced USD 849 apart depending on where it was booked — the lowest median was USD 388. We search every airline and the major booking sites at once so you always see that lowest price.
Frequently asked questions
- How much does a flight from Boston to Chicago cost?
- Based on 250 offers analyzed, Boston to Chicago flights range from USD 388 to USD 1794, with a median price of USD 557. Search for your specific dates →
- What hidden fees should I expect on Boston to Chicago flights?
- On average, ancillary fees (bags, seat selection) add USD 44 to the base fare on Boston to Chicago flights. See itemized fees for your itinerary →
- Which airline is cheapest on Boston to Chicago including all fees?
- F9|DL has the lowest median fare on Boston to Chicago at USD 388 (median across 1 offers in our snapshot). Check which airline wins on your dates →
- Which booking site has the cheapest Boston–Chicago flights?
- It depends on your dates — no single site is always cheapest. We search every airline and the major booking sites at once (travel agencies and meta-search included) and surface whichever is lowest; the best median in this snapshot was USD 388. Run a live search and we'll find the cheapest for you →
- Why do prices vary so much on Boston to Chicago routes?
- Boston to Chicago has 6 airlines competing, creating a price range from USD 388 to USD 1794 across 250 offers. There are two distinct fare clusters on this route: budget options and premium fares. Find where your trip lands in the distribution →
6 airlines, two price clusters — find which fits your budget
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